Made by Iver Johnson Arms Works - 244 Main Street, Worcester, Massachusetts after 1871.
In 1881 the company moved to Fitchburg, Massachusetts as the 'Iver Johnson Arms and Cycle Works'.
The series featured numbers 1 through 4, and came in rimfire calibers .22, .32, .38, and .41.
They're commonly called a 'Suicide Special', and are quite common, and of fair to good quality in construction.
Vaya,
Scouts Out!