Philatelists have a tough time categorizing these too. The closest is "event covers" which is a super broad category covering eveything from really neat stuff like these to homemade covers celebrating very obscure things.
Like "Eds hot dog stand first day of operation"
GS is Gateway, and Z is well... Z.
Both had some serious connections and an impressive network of people in every major league city. They would have envelopes and sometimes a stock of special stamps ready to go. When something like a 300th win or 3000th strikeout happened they'd connect with a post office insider if it was after hours, and get at least 500 envelopes cancelled and handed back.
It's not as easy as it sounds to get that done even during hours.*
The foil and silk were added later.
Cool stuff.
*I tried to do 20 for 9-9-99, and the po I went to refused to do handbacks. So I mailed them, and got three different cancels, a couple that didn't get in the machine until 9-10 and all of them got pretty beat up in the mail process since I hadn't added stiffeners.
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06-27-2021, 11:08 PM
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