That all depends on what kind of Smith & Wesson it is.
A Smith and Wesson 459 (or 5904) 9mm in mint condition and deactivated is worth around £400 currently
1948. Worth spending the $30 to get it lettered by Smith and Wesson, IMHO.
No such model number.
about $150
The 1966 Mod 60 Smith & Wesson in good condition is worth $1,200.00
50 -500 usd
50-400 usd
50-1000 usd
100-225 USD
50-150 USD or so
$400 - $500.......