Cory ,
The likelyhood of a Jan '62 , C3OZ part number fan is remote as you have suspected. It is probably a Jan '67. The seller is a local "flipper" with ties to the long defunct FPP. While it appears to be genuine and not a repop , I agree it will be tough to get top dollar for it. OK for "being there" on a driver but "could" be an issue with "da judge".