The genesis for the Model 52 is the Model 39. The early Model 52's used the same lock work as the Model 39, with the exception of a lock-out screw, preventing double action usage. S&W sells the 952, which is a 9mm version. However, it's only listed now in the archives section. The price topped $1,600 when available.
There are differences between the 52-1 and 52-2 models, in that the ejector was changed to that of the Model 39. There are documented failures of the -1 extractors; and no parts to repair -1 models are available.
Brian is spot on about the ammunition. Winchester, Remington, and Federal factor wad cutter loads work fine. However, Fiocchi brand ammo has feed issues. As a matter of history, when S&W sold its own brand of ammo (Fiocchi made), it would not reliably feed in Model 52's.
My brother had three in his cop shop. I foolishly passed on buying a Model 52-2 for literal wholesale cost.
I own one (52-1), and it's probably the most accurate semi auto I've ever owned. I have a set of RCBS dies set up exclusively to reload WC's. I bought it NIB earlier this year. I bench tested it, and at 25 yards it will shoot 1" groups; far more accurate than I am.
The other competitor at the time was the Colt 1911, chambered in .38 Special. They're rare birds, and I let one slip through my fingers last year after balking at the $1300 price tag.
It's a gorgeous gun, unfortunately from a target shooting era that has passed.
Best, Dennis