My S&W is what I suppose is the first version Model 59. It has an unprotected windage adjustable rear sight.
I never liked the feel of the grip. The thin plastic grips are okay but the slab sided grip frame has no radius at all at the web of thumb. Alright for most I suppose but I don't have much flesh there.
From the looks of later models others have had the same problem and they addressed it in later grip designs.
I considered filing a radius there but decided not to alter what might be a collectible .
The early version have a rather sloppy trigger pull, it's apparently that way for all these and not just mine.
When cleaning up a CZ52 for a friend I was surprised to find the grip of these felt no better in my hand, though it looks like it should be comfortable. I guess my hand only fits a revolver grip well.
When firing this same CZ52 years ago I found I could not hit the ground with it if I dropped it, though no one else had a problem with it.