I just requested the info from S&W on mine, but if it helps, '38 s&w special ctg' and the serial is 3705. On the barrel behind the front sight, it does have: 'x'S.U.S.A. Patented
14.09.DEC.29 14
Cylinder is a 6 shot. I don't know if they tried to center the serial's over the grip pin, but mine is slightly off center.