L@@K here ...
http://www.pierrons.net/QuickSearch.aspx?ipp=10&vwss=2&asc=1&countryid=84&order=1&vwit=1&selYear=0%7C0&tag=1&fastfind=&var=&desc=&from=&to=&catno=&search=
I have a Trinidad and Tobago - Scott #52 with a definite colour shift of the black onto the red border. I double checked this against another copy I had to make sure it wasn't just simply some type of cancelation.
It's a minimal value stamp -mint lightly hinged, so we're not talking mega bucks. I'm just wondering if colour shifts affect CV. This one is going in my album anyway but this is the first time I've experienced it and I'm curious in case I come across it again.
Likewise when I came across the error overprint of British Occupation of Batum, I've never seen error overprints so it's kind of neat. I almost missed it but noticed the footnote and went back and to my surprise, there was one there.
re: Question re: Colour Shift
L@@K here ...
http://www.pierrons.net/QuickSearch.aspx?ipp=10&vwss=2&asc=1&countryid=84&order=1&vwit=1&selYear=0%7C0&tag=1&fastfind=&var=&desc=&from=&to=&catno=&search=