No published sn data.
The Smith & Wesson Model 37, known as the Airweight revolver, was produced starting in 1952. The serial number 21JXXX indicates it was manufactured in the late 1970s to early 1980s, as the "J" prefix was used during that time period. For an exact year, you would typically refer to Smith & Wesson's serial number lookup or production records.
Early to mid-80s
Late 1973 to early 1974.
Early to mid 80s
Your early J frame model 36 Smith and Wesson was made in the year 1955 with the serial number that you have provided.
Late 1974 to early 1975.
Late 1973 - early 1974
Early to mid 80's
Early 1970's.
Early 80's.
Shipped in the early 80s
Late 1963 to early 1964.