Best to ask a gunsmith for help
You can request a manual or download one at the S&W website.
Your serial number indicates that your Smith and Wesson model 59 was made in the year 1975.
No
No
Your serial number dates your Smith and Wesson model 59 to the years 1977-1978.
Properly referred to as a Smith and Wesson Model 59. 100-400 USD
250-400
The Model 59 was made from 1971-1982
Your serial number indicates that your Smith and Wesson model 59 was made between June of 1978,thru 1979.
50-500 usd
Yes