what is the model
27 years old
With the serial number that you have supplied,your Smith and Wesson model 15 was made in the year 1950.
The smith and wesson model 15,4th change (15-4) was made by smith and wesson in 1977.
This gun was manufactured in 1991, according to Smith and Wesson headquarters.
No such model number in the S&W catalog
If you contact Smith & Wesson, they will give you that information.
The smith and wesson model 19-3 was made between the years 1967-1976.
There is no S&W Model 111
Your smith and Wesson model 24-3 was made by smith and Wesson between 1983-1984.There were 7,500 made with the serial number range being ABZ0000-ABZ9999.
Serial Number on the butt.
Made in 1968.