A seller on eBay is listing two Yaz stamps with images of his 1975 card. These are not a Topps test issue (as per the listing) but are part of a collector's fantasy set put together a while back with, I believe, every regular issue Topps Yaz card made into a stamp. Beware!
https://www.ebay.com/itm/303586210160?ul_noapp=true