The set was produced on two sheets. I have to think a lot more than 20 of each sheet were produced. I am not a graded collector but it looks like there are 8 or so completed sets on the Registry. I have 4 sets. And, I bet if someone has access to the PSA population reports it will show a lot more than 20 for different players. I do think the white backs are much scarcer. See Dave Hornish's blog about why that might be
https://toppsarchives.blogspot.com/s...Topps%20Deckle
Couple of articles
https://r.search.yahoo.com/_ylt=Awr4...IOa4b8GeYIo.E-
https://r.search.yahoo.com/_ylt=A0ge...kEj0zC.Gx8_j4-