I do no think you will get a good answer on this. I have asked before. There are quite a few variations and many do not have date codes. If you do a search you may find some old post with pictures.

Just because a WP is on a motor that looks old and original does not mean it is. I have rebuild many and when you clean them up, the bearing shaft is over sized meaning they were rebuilt before.

Either variation of the wp you showed would work.