How to tell the difference between original and counterfeit proof set envelopes

route66

I think this was answered a couple of years ago. How can you tell if a proof set envelope (1950's-60's) is original and not a new one? Still sealed means nothing if you can't tell the envelopes apart. Do you think most of them on E-bay are phony?Thanks
Steve

Bochiman

One of the ways is to look for the creases on the envelope. If it is old, a lot of the times, you will see the crease of the flap. Else, a lot of the new ones won't have that crease.
Not 100% foolproof, but a starter....

Trinketts

Just know that about 95% of UNOPENED proof sets on Ebay are opened, searched, and resealed.

route66

ttt

291fifth

You can't. The proof set envelopes were made from ordinary envelope stock and inprinted via letterpress with easily available typefaces. A local coin club member, now deceased, used to make them for the local dealers. They looked better than the worn out envelopes seen on the bourse floor in those days.

route66

ttt

100proof1957

if you THINK its a reproduction it probably is.

If you have it in hand,smell it,you can tell.