Phil, that Hornsby is a Type 1. The Type 3 will have the bottom line in Serif Font, not block letters. Obviously PSA is dumb for calling it a 1922 E121 Series of 120
(as it clearly states “eighty” on back)
They would keep the Serif font at base for the following year’s E121 Series of 120 set.
Also, it should be noted that only a few cards have been found with the Type 4 back and Hornsby is bot among them. Also, i have seen multiple of most of the players with the Type 4 back so it is most likely that the Type 4 back is simply a subset of Type 1 and only affected a few players on a sheet or something.