Impossible to answer without the serial number. The serial number is on the butt.
300-400 USD
The Model 19 was not made in stainless steel.
Look on frame inside the cylinder area to find the model number of a Smith and Wesson 357 mag snub 2 in stainless barrel
I would start my search at Smith and Wesson first.
The serial number is on the butt of the weapon. From that, you can determine when shipped by calling S&W or looking it up in the Standard Catalog of Smith and Wesson.
The 41 Magnum is the Model 57 or 58. The Model 29 is a 44 Magnum.
Stainless steel.
100-425 USD
It was Smith & Wesson Model 29 with 8 3/8" barrel.
The S&W Model 57 chambered in .41 Magnum with a 6" barrel will range from about $400 to $2000 depending on condition and age.
What model?
100-550 USD or so