Bought this in a gunshop today, was marked 38 special, but it isn’t. A 38 cartridge only goes about 1/2 in cylinder, and is just a bit loose. I’m guessing it’s a S&W 38 caliber. No caliber or model markings on frame. Serial is 699306. Frame is a little larger than my 31-1. Has a very smooth action and 5 screws in frame. The cylinder is long enough for 38 special, but has the step inside which stops the cartridge. I’m thinking about returning it this week, I have nothing to reload a S&W 38.