Thanks for the education, definitely not confusing the M60 and M66. Just ignorant about M60s and I guess J frames in general.
I have a half dozen J frames though my interests lay primarily with K frames, but the M60 I posted photos of really is the first (at least that I recall) fixed sight, 3” HB, SB I’ve seen for sale. I’ve seen a variety of photos of different M60 configurations posted here by members and always thought fixed sight M60s of any configuration were kinda rare. And the same with SBs.
When I was looking for my own M60 I wanted a 3” and it seemed all 3” had HBs and adjustable sights. I finally narrowed my choice down to two, both with HB, adjustable sights, one 38 and one 357, both RB. I picked the 357, and it’s shown in the photo below.
I’m thinking you can determine which J frames I have just looking at the photo below, but they’re an M51-? , M30-1, M 37 no dash (those two might be in opposite order, any difference in shade of the frame/cylinder/barrel of the M37 is just lighting and the two look identical to me,) m317-?, M638-? and the M60-? I’m going to have to find time today and re-aquaint myself with my J frames.