Quote: Update: just got it back from APS, certified genuine! Valued at 5000.
We have a winner!
Now make arrangements to get a photograph, copy stand helpful, of the entire sheet. Then have the photo (or scan) printed at full size. Do a closeup as well to show the missing black better. Add a copy of the certificate and frame it all, still using UV blocking glass, and hang it where ever you want.
So, what do you plan to find next? Perf 12 JPJ, 2630c, or what in your scrap postage?