I've been shopping for a spare J frame and ended up with this new (old) Model 37.
I believe the combination of the newer thumb piece and diamond grips happened 1966-1967, correct? Serial#533092.
It has a little rust near the end of the barrel on the right hand side, light rusting spots on opposite sides of the cylinder, and a few little spots where the black is chipped off of the frame. It doesn't look like it was shot or carried much - I'm guessing the rust happened while stored somewhere that got a little wet. Grips are in good shape and number to the gun.
$375 out-the-door, that probably wasn't a great bargain but I'm pretty pleased since I had been through a lot of shops over the last several weeks and used, no-lock, J frames were scarce.
Jeff