You may indeed be right, Graham... The original chrome-finish motor failed and was replaced by Pentax with a black-finish one which I then don't recall ever using! But the finish does match the K2DMD...
Finally needed a reliable motor drive and ended up with Nikon FM2 & FE2.

Got this lens today. It's in excellent condition with clean glass. It was attached to a Spotmatic. Paid $5.00.














The Auto-Takumar looks like it works really well on the Sony. I came across one I forgot I had 🙂 (was considering buying an SMC 35/3.5).





