In the 1980s many of us used to check the incoming mail for stamps with plate numbers. In fact i received one recently from a fellow Stamorama person..i had to soak it off..then i found two stockcards of PNC's in a U.S. stock book. On these 25 cent Yosemites the numbers will be hard to see from my scan..#2 one stamp #4 2 stamps #5 2 stamps #7 three stamps #8 one,#9 6 stamps,#10 2 stamps #11 2 stamps #13 2 stamps,#14 3 stamps.
re: Used plate number coils or inexpensive fun with U.S. stamps
Still fun. 2015 Red Knot 'plate' P111, of the Coastal Birds Postcard Stamp Series, FDoI 20150601, cds New York City 20151215, with one of those shpritzy cancels that I think ... oh, never mind, I'll spare you.
Cheers,
/s/ ikeyPikey
  1 Member likes this post. Login to Like.
"I collect stamps today precisely the way I collected stamps when I was ten years old."