To your point, Ron, see this Leifield (throwing) with an Old Mill back here:
https://bid.robertedwardauctions.com...e?itemid=93451
Total PSA pop is one. Total SGC pop is 2.
There was a Leifield among the Sovereign 150 batch that sold last night. It's one of the scarcest Sovereign 150 cards after Isbell, but the Old Mill version is much scarcer.