1960's proof sets
Was having a discussion with a fellow numismatist about proof sets in envelopes. He had a bunch of "sealed from the mint" sets, or so he said.
I said the Mint did not seal the sets and they sent them out un-sealed. It was up to the owner or a humid environment to seal the sets, said I.
I said, then how do you explain all the unsealed sets on ebay with no damage to the flap?
He said they were steamed open.
I said, balderdash.
Obviously I don't believe the Mint had the capability to wet and seal the sets. If so, then why weren't all of them sealed?
Discuss, what do you think?
This is not the person I was having a discussion with....just an ebay listing. I bet I could get DNA off those flaps.