I am glad to be a new member of the Smith & Wesson Forum. I just purchased a nice Model 48 with four inch barrel serial number 73161 with recessed chambers and pinned barrel. Can someone tell me the date of manufacture? Also did S&W offer an extra cyl. in 22 LR for this model? Mine has Pachmayr grips and I would like to find original walnut grips. Thanks for the opportunity to be a part of this forum. Malvin