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.
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
The user is the safety.
10-100 USD or so
It's your control of your trigger finger. There is no safety device on a Rohm revolver.
25-75 USD or so
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 ...
This was probably either a Safety Hammer Model or Safety Hammerless Model made from 1892 to 1950. In the 2004 Blue Book the Hammerless was worth $60 in 60% condition and $125 in 100% condition and the Safety Hammer model was worth $40 and $100 respectively.
Impossible to answer without a detailed description of all markings, caliber, finish, condition, box, accessories, etc..
Double action revolver
Robert Johnson - safety - was born on 1987-02-13.
It's a "Safety Automatic" revolver, but would need to know the exact markings including patent dates to determine which model and year of manufacture. The C prefix was used for several years and the numbers duplicated with Second Models and Third Models.
hammer safety block
Watch your fingers, and dont have your face and the hammer in a direct line. Don't use a 1 lb. hammer for a 10 lb. job.(claw hammer as opposed to sledge hammer)
If you have no idea what you are doing find someone else who does. First, point the gun in a safe direction. Make sure it is not pointed at any body part of yours or anyone else. Ground is best. If there is enough room between hammer and the frame place a finger of your off hand on the hammer (NOT on the frame, a falling hammer might hurt and an older one with a firing pin on it will draw blood). Hold the hammer with your thumb and pull the trigger, then let the hammer down slowly. Be careful, on some older revolvers there is no safety mechanism that prevents a shot when the trigger is not all the way back and a falling hammer will make it fire. Don't decock a revolver when your fingers are wet or greasy.
Seldom exceed 100 USD
Most likely made in the late 1890's-early 1900's time frame. Iver Johnson made one with a manual safety on the frame. Meridian and Harrington & Richardson made them without the manual safety. The H&R has a hammer mounted firing pin. The Meridian has a frame mounted firing pin. Spain and Belgium also made them. Value seldon exceeds the 50-100 range.