Smith & Wesson 32 long CTG Serial #394670
.32 Hand Ejector Third Model.
Serial numbers ran from 263001 in 1917 to 536684 in 1942. SN 321000 was in 1920.
There was a recall for 586/686/581/681 no dash and -1's many years ago. The primer from a certain brand of 125gr ammo could flow back into the firing pin bushing and tie the gun up. S&W would replace the bushing. It's very unlikely you'd ever have that problem and if you did the recall is still active. Modified guns received a "M" stamp near the model number.