It will have a barrel of some length between 7/8" and 14.5", it will have a cylinder that holds the cartridges, it will have a frame surronding the cylinder which the barrel attaches to, it will have, in most cases, a trigger guard and a trigger, it will have a grip of some sort that will have metal, wood, plastic or rubber one piece grip or two piece (or more) grip panels; it may or maynot have a visible hammer; it probably will have a front sight and some sort of rear sighting arrangement; usually will have something on frame or under the barrel to release the cylinder for loading and unloading; and it can have a finish of almost any color now-a-days, but mostly blued or stainless steel or nickel plated. Hope this helps...????
22-72
Smith and Wesson Model 1
All of them have a sn.
S&w
A .22 caliber Iver-Johnson Cadet revolver.
Impossible to answer without knowing who made it.
300-500
50 or so; no published sn data.
Best left to a gunsmith.
l Blue Book of Gun values
No such S&W model number.
Sauer, Schmidt, Rohm