GKTTXAG
I would bet your I frame was .38S&W Regulation Police when it was built.
The Standard Catalog of Smith and Wesson says it was built between 1917 and 1940. I'm sorry but they don't break it down further.
Without photos this is a guess. It wasn't modified at the factory. Somebody had a Regulation Police and modified it into a pocket revolver.
I would bet your I frame was .38S&W Regulation Police when it was built.
The Standard Catalog of Smith and Wesson says it was built between 1917 and 1940. I'm sorry but they don't break it down further.
Without photos this is a guess. It wasn't modified at the factory. Somebody had a Regulation Police and modified it into a pocket revolver.