This is a job best left to a gunsmith
A Smithh and Wesson model 19-2 revolver with a 6 barrel with Target sights and hammer can range in price from $50.00 to over $200.00.
Smith and Wesson Model No. 2
Probably a Model 66
The Smith and Wesson model 58 is a 6 shot N frame revolver in caliber .41 magnum with a four inch barrel and fixed sights. It is the nickel version of the model 57. The model 58 is still available from Smith and Wesson. The condition mostly determines the value of the firearm. A model 58 in fair to excellent condition might be priced from 250 to 1000 US dollars.
In this forum's context, Smith and Wesson, Target Sights.
No
The frame size of a Smith and Wesson model 66 is K.
value of smith & Wesson model 5906 pistol
N frame, fixed sights, 41 magnum. 100-1000 USD depending on condition, accessories, box, papers.
No such model listed in the Standard Catalog of Smith and Wesson. You will need to call the factory.
The Smith and Wesson model 19-5 was made from 1982-1985.
The smith and wesson model 18-3 was made from 1967-1976.