Help Me With This Lowball Peace Dollar

"As correctly pointed out ... the 1921 Peace dollar is the only example in the 24 coin series that can be identified without a date ... and as such the TPG require them to be dateless to certify as PO01."

Not quite true.

About 40 percent, and no less than 10 percent, of the 1922 issues can be identified as such by looking for the "Detached Olive Branch" variety. These were a feature of the 1922 Trial Strikes; which account for about 10 percent of the mintage. Another 30 percent were of the "Modified Detached Olive Branch" variety.

Additionally the 1934 and 5 Peace dollars were produced from a new Master Hub; quite distinct from the earlier years. And while that does not differentiate a 1934 from a 1935; finding one with a "D" ( VAM III-C) Reverse does lock it into being a 1935-S

Lastly a C2 Reverse with a VI Obverse and a "D" mintmark identify it as a 1934-D