There was another post on one of these covers, but I thought it would be fun to share a side by comparison of this great Newfoundland issue of the "blue seal".
Not to be confused with the blue seal stamp from 1868-1879, these three stamps were engraved with perf 12 x 12 at three different times, with slightly varying colors. These are hard to find just so, with certification--but on cover, one can be almost sure by sleuthing the dates. I might be incorrect but I believe these are one of each.
Here are the following:
Scott #53 "Pale Blue" (NSSC #50), issued first in 1880. (My exemplar was canceled in 1884)
Scott #54 "Dark Blue" (NSSC #50a), issued 1887. (My exemplar was canceled 1889)
Scott $55 "Bright Blue" (NSSC 50b), issued 1894. (My exemplar was canceled in 1894)
And to the eye, the colors appear different, though hardly scientific with 120 years of aging..
I think...





