I don't know if you'll find them on any checklists, but that Conklin was inserted in 2019-20 Upper Deck Series 2. They did 1/1 buybacks of every base & YG Upper Deck card from 90/91 through 18/19.
19/20 Upper Deck Series 1 had cards from 90/91 - 04/05, and then Series 2 had cards from 05/06 - 18/19.
You should also be on the lookout for similar Conklin 1/1 buybacks from:
01/02 Upper Deck YG
03/04 Upper Deck
04/05 Upper Deck (also on COMC/eBay https://www.ebay.com/itm/233952355384?hash=item3678a5a438:g:oywAAOSwhyRgZ8uc)
05/06 Upper Deck
08/09 Upper Deck
09/10 Upper Deck
11/12 Upper Deck
-Derek-
