Well, the summer is apparently starting to cook here in Northern Cal...what with Singers for a Song and all that. I'll have to be satisfied with my humdrum recent 60's PX-10 acquisition. Knowing how tricky dating these lovelies is, I'll report that close inspection of Prestige derailleur revealed a stamping (3-68) on jockey cage. This closely coincides with probable build date of this PX-10 w/Model 93.
Also, I noticed that pics of 60's PX-10s (if B&W), have black-painted seat-lug and BB shell while 70's are left white...just head-lugs black. I wonder if this change can be traced to a specific year and ditto change away from Nervex Pro during 70's PX-10?
Jack Romans
Sacramento, California
Land of $500 Singers!