I have a Model 36, 2 1/4 inch barrel, with pearl handles. Serial number BJ 20XX. Can you tell me what year it was made?

Re-check the number on the bottom of the grip frame. The one you gave doesn't conform to the regular number/alpha character sequence.

Depending on age, most common examples should have a "J" with numbers following, or a "J" imbedded in the number sequence, or a 3 letter-four number sequence. (later models)

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Ret. LE, FA Instr, S&W Armorer