What would be the year of production be for 39xx, 4 digit serial number ...... 1957? When doing research online I found a Wikipedia page on the Model 41 where is states that S&W produced 679 units in 1957, (referenced to Jinks, Roy G.; Krein, Sandra C. (2006). Smith & Wesson (MA) (Images of America). Boston: Arcadia Publishing. p. 128.). So I'm a bit confused on a production date. Any help would be appreciated.