Impossible to answer without more details.
The Smith and Wesson 915 is a semiautomatic 9mm hand gun. The 915 was discontinued in 1995 when the 910 was released.
Oh, dude, you're asking about a Smith & Wesson 9mm semiautomatic model 5906? That's like asking me to calculate the exact number of sprinkles on a donut. The value of a gun can vary based on its condition, age, and any modifications it may have. You'd need to check with a firearms expert or do some research to get a more specific answer.
Smith and Wesson 9mm Model 39-2 Chrome finish.
it is a Model 39-2 9mm pistol
You can request a manual at the Smith and Wesson web site.
You can request or download a manual from Smith and Wesson's web site.
50-275 usd
No such model in the S&W line.
100-400 USD
1954-1982
50-450 usd
100-400 or so