This was issued in 1976 (issue price was $325). It is worth $750-800 if unfired and with box.
The smith and wesson model 18-3 was made from 1967-1976.
From 1957-1976
1976
1976
1976
1975-1976
1976
@1976
The Model 29 is a 44 Magnum. So either this was misstamped or someone put a 357 bbl on a Model 29. Misstamped 50-500 USD Rebarreled 50-350 USD
With the serial number that you have provided,your Smith and Wesson model 39-2 was made in 1975-1976.
The smith and wesson model 19-3 was made between the years 1967-1976.