there were two models. The first was made from 1882-1884 and the second from 1884-1899. The first has markings on the top strap. The second has markings on the top of the barrel. This is about all I've found out so far.
Iver Johnson
The Iver Johnson american bulldog revolver was made in 3 different models.The first model was made between 1882-1884,the second model american bulldog was made from 1885-1899.and the american british bulldog was made between 1882-1887.
American Bulldog was a name used by at least two different manufacturers. Early guns by H&R date from the early 1900's, but Iver Johnson also marketed a revolver under that name in the 1970's. Johnson and Bye, a predecesor of Iver Johnson, also made an American Bulldog in the late 1800s. These can be identified by an owl's head on the grip.
Very broad question that we may not be able to fully answer. There WAS a revolver made by the Iver Johnson Co. that was known as the American, Young American, and American Bulldog in the early years of the 1900s.
It's known as a "44 Bulldog" caliber and hasn't been loaded in many, many years. It is only available through custom reloaders such as "Gad custom cartridges" for $35 a box + shipping. I have an old "Bulldog" made in 1887 that uses this ammo. They're fun to shoot if they are tight.
I can say that the Iver johnson target model small frame(,22cal)was made from 1925-1928.The iver johnson target large frame(.22cal)was made from 1921-1941.
usa
The Iver Johnson 1911s are primarily manufactured in the United States. Iver Johnson Firearms, known for its historical firearms, has facilities in the U.S. for producing their models, including the 1911 series. The company has a long heritage in American firearm manufacturing, contributing to its reputation for quality.
The Iver Johnson .22cal supershot automatic model 90 witch you describe was made by Iver Johnson between the years 1932-1941.
They do not make a nine shot pistol made by Iver Johnson. These pistols were available in the 1940s.
Iver Johnson made many different firearms. Serial 24474 is one of them.
The Iver Johnson "Cattleman" series was made by A. Uberti in Italy then imported and sold by Iver Johnson. In good shape, around $350.