Data over on handloads lists 62 as experimental, not issued.
Have no listing for a model 62 in any of my references, OTHER than a very small 22 LR auto (Escort).
Whenever a gun seller starts telling you the fabulous story about THAT gun, remember- "Buy the gun, not the story."
BTW, I have a really great Ruger .22 pistol for sale. Similar to the Ruger Mark 3. The only made one made- usually referred to as the Pi model. Ruger found they did not have room on the frame for the full model number- 3.141592653589793238462643383279502884197169399375 10
Hey- make you a real good deal........
Seriously anyone that claims to have an unlisted, experimental handgun from S&W better have something to back that up. Like a letter from S&W.