Iver Johnson revolvers were massively popular around end of the 1800s and the start of the 1900s they were marketed as a safe option for the working class person.
Between 1899 and 1908 nearly 700,000 were made.
The “Hammer the Hammer” ad campaign sought to demonstrate the fact that their guns wouldn’t fire on a loaded chamber if the hammer was hit due to a trigger safety built into the gun.
Ian’s Video: [6:06] https://youtu.be/zQknkwifljg?si=
Sounds like the cost of learning would be some fingers.