Your serial number indicates that your Smith and Wesson model 59 was made in the year 1975.
39 holds less rounds then the 59
No
No
Your serial number dates your Smith and Wesson model 59 to the years 1977-1978.
250-400
100-450 USD
Properly referred to as a Smith and Wesson Model 59. 100-400 USD
Your serial number indicates that your Smith and Wesson model 59 was made between June of 1978,thru 1979.
50-500 usd
Yes
100-450 USD or so