Impossible to answer without knowing who made it.
S&w
Sauer, Schmidt, Rohm
1962
One of many 22 single action revolvers made by the company
Value seldom exceeds 100 USD
Your revolver is 9 shot revolver any speed loader made for a 9 shot 22 revolver might work but I have never seen such a thing
11569-s 22 long rifle woodsman
That 22 revolver is IJ targeted sealed made in Pittsburg, Ms.
Impossible to answer without the name of the maker
If you call S&W they will tell you when it left the factory.
A .22 revolver takes CARTRIDGES. Which .22 cartridge will depend on what caliber the revolver was made for. A .22 LR can shoot Long Rifle or Short cartridges, and a .22 WMR uses .22 magnum cartridges. They do not interchange. There are a few .22 revolvers that have 2 cylinders, and can shoot either cartridge.
The value of a German made 22 caliber revolver would actually be dependent upon a number of factors. Some of those factors would include the age and condition of the revolver.