Value seldom exceeds 100 USD
These were made by the Iver Johnson Company from 1910-1935. Your revolver is from around 1930.
Hammerli
A secondary brand of the Iver Johnson company, your US Revolver Company .32 was probably made between 1915 and 1917.
No such weapon made by S&W
The US revolver Company 32cal was made from 1911-1935.these were made by Iver Johnson but were never listed in their catalog.These were available thru mail order catalogs.
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.
One of many 22 single action revolvers made by the company
A few hundred to multiple thousands depending on EXACTLY what you have and its condition.
"U. S. Revolver Co." weapons were made by Iver Johnson. It was most likely made 1900 - 1920. It is a curio, and if in very good condition may have a very attractive value to a collector, but that's the extent of what I can tell you.
They were made from 1911 to 1933. If you have the serial number, we can give you the year of manufacture. The US Revolver brand was a named used by the Iver Johnson Company.
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