1926 The first course of action to discern the value of a gun is to identify the make, model, manufacturing date, and variation. The book "Iver-Johnson Arms & Cycle Works Firearms 1871-1993" by W. Goforth may help accomplish this. Then it's a simple matter of looking your gun up in one of the many firearm value books, such as the Blue Book of Gun Values, or the Standard Catalog of Firearms.
1930
A short-barreled version of the Safety Hammerless revolver manufactured from 1968 to 1975. The Safety HAMMER Revolver.
The only "safety" is you. You can test for "push off" by cocking the revolver and attempting to "push" the hammer forward with your thumb. This will let you know if there is unacceptable part wear.
I am afraid that you Iver Johnson revolver is not worth much.it is valued at 50-100 dollars depending on condition.
BLue Book of Gun Values
10-100 USD or so
25-75 USD or so
The user is the safety.
32 caliber Safety Automatic revolver (serial number 463344). (McKinley succumbed to these wounds nearly eight days later, at 2:15 am on the 14th of ...
It's your control of your trigger finger. There is no safety device on a Rohm revolver.
20-200 usd
Impossible to answer without a detailed description of all markings, caliber, finish, condition, box, accessories, etc..