50-450 usd
1948. Worth spending the $30 to get it lettered by Smith and Wesson, IMHO.
20000
No serial number given.
The worth is $539
Impossible to answer without more information.
1950-1969 for exact information, it is worth the price to get a factory letter from Smith & Wesson
100-400 USD
100-450 or so
50-100 usd
50- 250 usd
Smith & Wesson revolvers were never made in Spain, although many copies were.
Impossible to value with only the serial number and no other information.