I recently acquired a 22/32 heavy frame target, serial 361xxx. It has the 32 regulation police style walnut grips with no medallion. They are pencil numbered inside matching the gun. The right side of the frame is NOT stamped 'Made in USA'. I understand that S&W didn't use medallions during the 20's and started stamping 'Made in USA' in late 1922. Would I be correct in placing the date of manufacture to somewhere around 1921-1922. Can anyone be more precise? There is very little information on this model in the SCOSW. Also, can anyone provide any information as to what years the regulation police style grip was used as opposed to the Bekeart style target grip.