You'll need to provide a lot more information.
Serial number with the last 2 digits replace with the letter X. You will find the serial number stamped on the bottom of the grip frame and you may need to remove the grips to see it.
Number of chambers in the cylinder.
If you open the cylinder you may or may not find MOD followed by the model number and perhaps a dash then a single digit, if it is stamped as such provide that information.
Description of the barrel, length, do it have a lock for the ejector rod, is that lock a small projection or part of a "lug" that encloses the ejector rod. If it has a lug that encloses the ejector rod does that lug extend to the front of the barrel. Length of barrel from front of cylinder to end of barrel.
Front sight description. Is it a half moon, a sort of quarter moon with a vertical face, or a ramp shape. If the front sight is a ramp shape, does it have a red or yellow insert. Color of the front sight, is it silver or black.
Lastly, pics would naturally be very very helpful. BTW, the very first S&W was a 22 caliber, so they've been making 22 caliber revolvers for a very very long time. Because you've posted in the 1961-1980 forum I'm assuming that it isn't a tip up or top break, if I'm incorrect you are really going to need clear detailed pictures of the entire gun and every single stamping.