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General Philatelic/Gen. Discussion : Image Sleuth Help

 

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DaveSheridan
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24 May 2025
07:00:37am
Hi All,

I need some help if possible. I'm no slouch with technology, but I'm having a devil of a time extracting a visible watermark on this stamp. The watermark shows clearly when held up against a bright light and I've run out of watermark fluid. The stamp in question is Victoria 1864 4d Rose-red watermark sideways (SG121aa). It's unpriced in SG, so it's a nice find.

Can anyone else try to find the sideways numeral 4 watermark on this image please? It's in the top half of the image and I can see it, but I need to share an unequivocal image.

Thanks in advance

Image Not Found

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PhilatelistMag20
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Stamp Collecting, What A Wonderful Hobby! :)

24 May 2025
08:46:19am

Approvals
re: Image Sleuth Help

David, not sure if this would take 20 years, but I DO have a T3 signoscope or mechanical watermark detector.
Not sure how to use Image Slueth, as such, but if you'd send the stamp to me, in a very colorful (commemoratives franked) envelope, I'll check it, and mail it back free of charge.
Let me know, what you think!
PM me for more questions!
-Ari

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DaveSheridan
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25 May 2025
12:38:53am
re: Image Sleuth Help

Thanks Ari, but I need a quick resolution to this problem.

I have an electronic watermark detector, which has languished in it's box since I bought it and used it once. Useless object.

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Bobstamp
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25 May 2025
12:51:39pm
re: Image Sleuth Help

The watermarkseems to be a bit more visible now, after some work with Pixelmator ("Photoshop" for Apple computers) to increase contrast and sharpness; I think I oriented the stamp the right way to see the watermark "right side up," assuming the watermark is actually there!

Image Not Found

Bob

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Bobstamp
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25 May 2025
01:02:20pm
re: Image Sleuth Help

Image Not Found

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Bobstamp
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25 May 2025
01:07:00pm
re: Image Sleuth Help

Stepping back from my display seems to make the watermark a bit more clear. Sort of.

Bob

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1899
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25 May 2025
01:31:57pm
re: Image Sleuth Help

If possible add arrows to parts of the watermark you see?

EDIT: Would it be possible to provide what the watermark looks like? Your purple (?) scan I think I can see partial of the crown!

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Bobstamp
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25 May 2025
04:48:45pm
re: Image Sleuth Help

@1899: I don't have a Stanley Gibbons catalogue, and don't know what the equivalent watermark would be in the Scott catalogue. In fact, Scott doesn't list any British stamps issued in 1864. There is a 4p vermillion stamp that was issued in 1865.

Bob

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sheepshanks
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25 May 2025
05:19:46pm
re: Image Sleuth Help

My 1990 SG Commonwealth does not list a 121aa but does list 121a, which is pale rose, emergency printing on Perkins Bacon paper watermarked with double lined numeral "4". No crowns.
From what I am seeing it looks more like a "2".

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DaveSheridan
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25 May 2025
06:26:53pm
re: Image Sleuth Help

The watermark is a single-lined numeral 4, and thanks for the effort, but I can't see it at all. Also, please note that the stamp is Victoria, Australia, not GB

Image Not Found

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1899
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25 May 2025
07:15:11pm
re: Image Sleuth Help

I have an idea, but it takes 2 people.

Hold the stamp in one hand, with the other hand hold a flashlight to the stamp, then the other person uses the camera and takes a photo of the watermark!

I know it sounds crazy, but maybe it would work.

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DaveSheridan
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25 May 2025
07:25:56pm
re: Image Sleuth Help

I tried that, to no avail. The pic, despite numerous attempts, was a white blob of a stamp. I'm still trying that method, but I'm going on the hunt for some lighter fluid tomorrow!

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sheepshanks
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25 May 2025
07:36:14pm
re: Image Sleuth Help

In my Scott 2011 Classic Specialized, it would appear to be Scott #76, watermark 80a if it is single lined (solid within the outline).
The double lined is Sc #91, watermark 75 and shows clear between the lines.
The left end of the crosspiece on 80a is a vertical bar, on 75 it is a triangle.

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sheepshanks
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25 May 2025
07:54:38pm
re: Image Sleuth Help

Here is a combined image of the front and back, what I'm seeing as a 2 could be the curled end of the postmark.
Image Not Found

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DaveSheridan
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25 May 2025
11:26:47pm
re: Image Sleuth Help

"what I'm seeing as a 2 could be the curled end of the postmark"



The watermark is a single lined 4. The curl you mention is a a pencil annotation remnant I couldn't remove

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gerom

26 May 2025
12:37:24am
re: Image Sleuth Help

I think it can be said that it is a type 4 watermark:
Image Not Found

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gerom

26 May 2025
01:19:10am
re: Image Sleuth Help

You can try using a desk lamp behind the stamp.
Good results are obtained (it also depends on the type of paper - coated paper is harder):
Image Not Found

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DaveSheridan
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26 May 2025
05:05:53am
re: Image Sleuth Help

I don't know what a type 4 watermark is, there isn't such a thing in Scott that I can see The watermark for this series was a single lined watermark that corresponded to the value of the stamp (2 for 2d, 4 for 4d, 6 for 6d etc). The way it's listed in Scott appears most unhelpful and inaccurate.

Image Not Found

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gerom

26 May 2025
12:18:47pm
re: Image Sleuth Help

Sorry..in Scott is wmk. 80a

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gerom

26 May 2025
12:33:13pm
re: Image Sleuth Help

Image Not Found

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DaveSheridan
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28 May 2025
08:37:04am
re: Image Sleuth Help

I finally managed to track down some lighter fluid, and excitedly looked for my watermark tray. Unfortunately it seems to be hiding with all my missing tweezers. So, it was back to basics as suggested by 1899, and voila, a nice sideways 4

Image Not FoundImage Not Found

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sheepshanks
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28 May 2025
09:04:03am
re: Image Sleuth Help

Glad you got it sorted, looks like the bar of the four has a fishtail so confirming double lined, it is also clear between the lines. Nice find.

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DaveSheridan
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28 May 2025
09:25:41am
re: Image Sleuth Help

We're not seeing the same thing. That's a single lined, solid, watermark. The bar of the four shouldn't be the decider here. The double-lined watermarks show a very clear gap between the sides, as clearly shown in Scott

Image Not Found Image Not Found

I've also just realised that's it's sideways reversed as well. I might be able to retire! Again.

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sheepshanks
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28 May 2025
09:32:45am
re: Image Sleuth Help

I stand corrected, well actually I'm sitting, but you know what I mean.

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DaveSheridan
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28 May 2025
09:35:39am
re: Image Sleuth Help

"I stand corrected, well actually I'm sitting, but you know what I mean."



Phew! I thought I was going mad there for a while
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amsd
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Editor, Seal News; contributor, JuicyHeads

19 Sep 2025
01:40:14pm

Auctions
re: Image Sleuth Help

can some one give me the URL for downloading image sleuth

when I look, it appears something different from what I expected, and I don't want to download mal ware.

thanks

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PhilatelistMag20
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Stamp Collecting, What A Wonderful Hobby! :)

19 Sep 2025
01:52:11pm

Approvals
re: Image Sleuth Help

Okay,
see photo!
Click the one of the links circled in grey/black. The yellow circled ones, and ANY pop up ads are MALICIOUS junk. X off the pop-ups.
The real link will take you to sourceforge. Do not click anything else there, just wait until your computer says it has downloaded.
Avoid clicking on anything else in sourceforge! That site is mostly garbage. (My opinion!)
-Ari
Image Not Found

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bigcreekdad
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19 Sep 2025
05:41:27pm
re: Image Sleuth Help

My eyesight is lousy, but in the 3rd pic I see an upside down "5"

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Author/Postings
Members Picture
DaveSheridan

24 May 2025
07:00:37am

Hi All,

I need some help if possible. I'm no slouch with technology, but I'm having a devil of a time extracting a visible watermark on this stamp. The watermark shows clearly when held up against a bright light and I've run out of watermark fluid. The stamp in question is Victoria 1864 4d Rose-red watermark sideways (SG121aa). It's unpriced in SG, so it's a nice find.

Can anyone else try to find the sideways numeral 4 watermark on this image please? It's in the top half of the image and I can see it, but I need to share an unequivocal image.

Thanks in advance

Image Not Found

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1 Member
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Login to Like.

www.globalphilately. ...
Members Picture
PhilatelistMag20

Stamp Collecting, What A Wonderful Hobby! :)
24 May 2025
08:46:19am

Approvals

re: Image Sleuth Help

David, not sure if this would take 20 years, but I DO have a T3 signoscope or mechanical watermark detector.
Not sure how to use Image Slueth, as such, but if you'd send the stamp to me, in a very colorful (commemoratives franked) envelope, I'll check it, and mail it back free of charge.
Let me know, what you think!
PM me for more questions!
-Ari

Like
Login to Like
this post

www.philatelistmagaz ...
Members Picture
DaveSheridan

25 May 2025
12:38:53am

re: Image Sleuth Help

Thanks Ari, but I need a quick resolution to this problem.

I have an electronic watermark detector, which has languished in it's box since I bought it and used it once. Useless object.

Like
Login to Like
this post

www.globalphilately. ...
Members Picture
Bobstamp

25 May 2025
12:51:39pm

re: Image Sleuth Help

The watermarkseems to be a bit more visible now, after some work with Pixelmator ("Photoshop" for Apple computers) to increase contrast and sharpness; I think I oriented the stamp the right way to see the watermark "right side up," assuming the watermark is actually there!

Image Not Found

Bob

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www.ephemeraltreasur ...
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Bobstamp

25 May 2025
01:02:20pm

re: Image Sleuth Help

Image Not Found

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Bobstamp

25 May 2025
01:07:00pm

re: Image Sleuth Help

Stepping back from my display seems to make the watermark a bit more clear. Sort of.

Bob

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this post

www.ephemeraltreasur ...
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1899

25 May 2025
01:31:57pm

re: Image Sleuth Help

If possible add arrows to parts of the watermark you see?

EDIT: Would it be possible to provide what the watermark looks like? Your purple (?) scan I think I can see partial of the crown!

Like
Login to Like
this post
Members Picture
Bobstamp

25 May 2025
04:48:45pm

re: Image Sleuth Help

@1899: I don't have a Stanley Gibbons catalogue, and don't know what the equivalent watermark would be in the Scott catalogue. In fact, Scott doesn't list any British stamps issued in 1864. There is a 4p vermillion stamp that was issued in 1865.

Bob

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this post

www.ephemeraltreasur ...
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sheepshanks

25 May 2025
05:19:46pm

re: Image Sleuth Help

My 1990 SG Commonwealth does not list a 121aa but does list 121a, which is pale rose, emergency printing on Perkins Bacon paper watermarked with double lined numeral "4". No crowns.
From what I am seeing it looks more like a "2".

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this post
Members Picture
DaveSheridan

25 May 2025
06:26:53pm

re: Image Sleuth Help

The watermark is a single-lined numeral 4, and thanks for the effort, but I can't see it at all. Also, please note that the stamp is Victoria, Australia, not GB

Image Not Found

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www.globalphilately. ...
Members Picture
1899

25 May 2025
07:15:11pm

re: Image Sleuth Help

I have an idea, but it takes 2 people.

Hold the stamp in one hand, with the other hand hold a flashlight to the stamp, then the other person uses the camera and takes a photo of the watermark!

I know it sounds crazy, but maybe it would work.

Like
Login to Like
this post
Members Picture
DaveSheridan

25 May 2025
07:25:56pm

re: Image Sleuth Help

I tried that, to no avail. The pic, despite numerous attempts, was a white blob of a stamp. I'm still trying that method, but I'm going on the hunt for some lighter fluid tomorrow!

Like
Login to Like
this post

www.globalphilately. ...
Members Picture
sheepshanks

25 May 2025
07:36:14pm

re: Image Sleuth Help

In my Scott 2011 Classic Specialized, it would appear to be Scott #76, watermark 80a if it is single lined (solid within the outline).
The double lined is Sc #91, watermark 75 and shows clear between the lines.
The left end of the crosspiece on 80a is a vertical bar, on 75 it is a triangle.

Like
Login to Like
this post
Members Picture
sheepshanks

25 May 2025
07:54:38pm

re: Image Sleuth Help

Here is a combined image of the front and back, what I'm seeing as a 2 could be the curled end of the postmark.
Image Not Found

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this post
Members Picture
DaveSheridan

25 May 2025
11:26:47pm

re: Image Sleuth Help

"what I'm seeing as a 2 could be the curled end of the postmark"



The watermark is a single lined 4. The curl you mention is a a pencil annotation remnant I couldn't remove

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this post

www.globalphilately. ...
gerom

26 May 2025
12:37:24am

re: Image Sleuth Help

I think it can be said that it is a type 4 watermark:
Image Not Found

Like
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this post
gerom

26 May 2025
01:19:10am

re: Image Sleuth Help

You can try using a desk lamp behind the stamp.
Good results are obtained (it also depends on the type of paper - coated paper is harder):
Image Not Found

Like
Login to Like
this post
Members Picture
DaveSheridan

26 May 2025
05:05:53am

re: Image Sleuth Help

I don't know what a type 4 watermark is, there isn't such a thing in Scott that I can see The watermark for this series was a single lined watermark that corresponded to the value of the stamp (2 for 2d, 4 for 4d, 6 for 6d etc). The way it's listed in Scott appears most unhelpful and inaccurate.

Image Not Found

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this post

www.globalphilately. ...
gerom

26 May 2025
12:18:47pm

re: Image Sleuth Help

Sorry..in Scott is wmk. 80a

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gerom

26 May 2025
12:33:13pm

re: Image Sleuth Help

Image Not Found

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DaveSheridan

28 May 2025
08:37:04am

re: Image Sleuth Help

I finally managed to track down some lighter fluid, and excitedly looked for my watermark tray. Unfortunately it seems to be hiding with all my missing tweezers. So, it was back to basics as suggested by 1899, and voila, a nice sideways 4

Image Not FoundImage Not Found

Like 
2 Members
like this post.
Login to Like.

www.globalphilately. ...
Members Picture
sheepshanks

28 May 2025
09:04:03am

re: Image Sleuth Help

Glad you got it sorted, looks like the bar of the four has a fishtail so confirming double lined, it is also clear between the lines. Nice find.

Like
Login to Like
this post
Members Picture
DaveSheridan

28 May 2025
09:25:41am

re: Image Sleuth Help

We're not seeing the same thing. That's a single lined, solid, watermark. The bar of the four shouldn't be the decider here. The double-lined watermarks show a very clear gap between the sides, as clearly shown in Scott

Image Not Found Image Not Found

I've also just realised that's it's sideways reversed as well. I might be able to retire! Again.

Like
Login to Like
this post

www.globalphilately. ...
Members Picture
sheepshanks

28 May 2025
09:32:45am

re: Image Sleuth Help

I stand corrected, well actually I'm sitting, but you know what I mean.

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this post
Members Picture
DaveSheridan

28 May 2025
09:35:39am

re: Image Sleuth Help

"I stand corrected, well actually I'm sitting, but you know what I mean."



Phew! I thought I was going mad there for a while
Like
Login to Like
this post

www.globalphilately. ...
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amsd

Editor, Seal News; contributor, JuicyHeads
19 Sep 2025
01:40:14pm

Auctions

re: Image Sleuth Help

can some one give me the URL for downloading image sleuth

when I look, it appears something different from what I expected, and I don't want to download mal ware.

thanks

Like
Login to Like
this post

"Save the USPS, buy stamps; save the hobby, use commemoratives"
Members Picture
PhilatelistMag20

Stamp Collecting, What A Wonderful Hobby! :)
19 Sep 2025
01:52:11pm

Approvals

re: Image Sleuth Help

Okay,
see photo!
Click the one of the links circled in grey/black. The yellow circled ones, and ANY pop up ads are MALICIOUS junk. X off the pop-ups.
The real link will take you to sourceforge. Do not click anything else there, just wait until your computer says it has downloaded.
Avoid clicking on anything else in sourceforge! That site is mostly garbage. (My opinion!)
-Ari
Image Not Found

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bigcreekdad

19 Sep 2025
05:41:27pm

re: Image Sleuth Help

My eyesight is lousy, but in the 3rd pic I see an upside down "5"

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