Welcome to the forum....
The number falls between 1978-1979 range somewhere, according to the Standard Catalog. Numbers for those years were: M100,000 - M130,000.
Smith and Wesson Customer Service may be able to narrow down the date for you. 1-800-331-0852
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Ret. LE, FA Instr, S&W Armorer
Last edited by armorer951; 02-03-2020 at 06:07 PM.
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