If all goes according to plan, I am going to show you three images of two PSE covers from the 1850s.
First the front of the cover I'm curios about showing the corner indicium. Next the inside of that cover showing the reverse of the indicium with color. Last, the inside of a different cover showing the reverse of its indicium with what I am presuming is the normal reverse imprint without color.
Is it uncommon for the color to be printed on the inside of the envelope as shown on the second image?
I can't remember where I read it (maybe in Scott US Specialized), but it is often found where envelopes were botched during manufacture with errors, mistakes, bloopers, goofs etc. While they will see a premium for whatever the printing mistake was, most do not command large values.
