Was looking through my Newfoundland stamps and came across a couple of the NFC1 "Custom duty" Edward VIII Prince of Wales stamps....Then started analyzing both of them....There was a distinct difference between the 2 "Custom Duty" stamps.
I am posting a well known example of a engraved stamp and then a re-engraved stamp {same design} to show you what I found....See example below.
Engraved stamp on the left {Scott 147 engraved-1928} and re-engraved stamp on the right {Scott 164 re-engraved-1929-1931}....Check out the colour differences.

Below is the stamp I am investigating....It is a NFC1 1925 Custom duty Edward VIII {Prince of Wales}....First notice the colour differences between the 2 stamps....Now you can say colour differences does not mean an engraved stamp has been re-engraved....But..But, look at the close ups of different areas of the stamps.






It is not recognized in Unitrade, N.S.S.C. and The Canadian Revenue Stamp Catalouge...Any ideas..??
Robert