Go to Proofhouse.com and search the Winchester sn tables
I would recommend Herbert Houze's book "Winchester Bolt Action Military and Sporting Rifles 1877-1937." He covers the Model 51. If you have one, consider yourself extremely blessed, and don't let anything happen to it! Only 75 were produced, all handmade as presentation rifles for Winchester's board and various VIP's.
The value of a Smith and Wesson Model 51 22 Magnum Revolver would actually depend on a number of factors. Some of these factors would include the age and condition of the Revolver.
Browning never made a Model 51 shotgun.
If the Model 51 is in very good condition it should bring $250 - $300.
The Model 151k was produced 1950-51. The average value for the model in good condition is approximately $100-$150. It is one of my favorite guns to shoot. Very accurate.
32-51 years old. You will have to call S&W to narrow it down more.
51
The Model 37 is a pump gun, and the 51 is a semi-automatic. I doubt seriously that the barrels are interchangeable, since they are totally different models.
What Model 51 pistol or a rifle and what model?
Savage. Model 51 & 951.
7.65 mm is usually .32 Automatic Pistol. The .308 is 7.62 x 51
It was probably made from 1950 to 1954 built by Husqvarna in Sweden. Very nicely made gun. In top shape you could get up towards $700. Most people don't know what they are and are confussed by the high price but I assure you if you have one it is worth holding on to. The Model 51-L first appeared in the Sears 1959 Fall & Winter Catalog and last appeared in 1963 Fall & Winter catalog. The Model 51-L was made by High Stadnard unsing the HVA acion. Prior to the Model 51-L, High Stadanrd made the Model 50 and Model 51 which were based on the FN manufactureed Mauser designed action. http://www.histandard.info/PDF/Sears%20CF%20Rifles.pdf