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Value seldom exceeds 100 USD
No such weapon made by S&W
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.
A few hundred to multiple thousands depending on EXACTLY what you have and its condition.
The Mark IV was not made in .32 caliber. It was in caliber .38-200 (the 38 S&W). Value is $200 and up, depending on condition. A SIMILAR revolver is made by IOF in India in caliber .32 S&W Long, and sells new (in India) for about $1,300 USD (no competing companies).
if it's a 38 cal. police positive, made in 1926
value depends on over all condition. made about 1893
no real value. the Rohn is classified as a 'Saturdaynight' special meaning it is not a quality revolver. depending on condition expect $50 - $75
5-50 USD or so
Anywhere from $350 to $800 dollars depending on the year it was made and the condition it is in.
Rossi M88: That may depend on when it was made. What is the serial number? That may help.
Impossible to answer without knowing who made it.