Revolvers with the BPB serial number prefix were shipping in Febuary to June of 1993. Mostly in February and March.

Your grips appear to have a July 1992 ink stamp. It predates the gun's ship date so it's possible it's factory original. Typically the dates are closer, like a few weeks or a month or two, but a six month separation is not impossible.

__________________
~ S&W aficionado in training ~