Identifying Your Ported S&W .357 Magnum Revolver

Question
I have a ported S&W 357, 4" barrel. I can't find another like it anywhere! What gun do I have? I can send you a picture if needed. Thanks gun expert.

Answer
The model number of your gun will be stamped inside the frame where the crane closes against it.

As to porting, for a long time MagnaPort was the only company that ported guns (they did many S&W revolvers), but now the S&W Custom Shop is doing it, and there are some factory variants that come with porting as well.