This is the stainless version of the model 13, which is a .357 version of the Model 10. They were made generally for law enforcement and security use, with a big chunk of sales going in that direction. They are good, solid self defense weapons.
The K-frame 357s were discontinued about 10 years ago in favor of the L frame, which is slightly beefier. In the 70s, there was some VERY hot lightweight ammunition out there (Super Vel brand) that cracked some K-frame 357s. So don't shoot tons of super-hot 357 rounds in it.
K-frames are great .38 Special platforms, and can be laser-accurate with .38 target loads whether you have a fixed or adjustable sight model. That one should date to the early/mid '90s I think based on the -4 and the "BPC" prefix.