: Letter prefixes continued but restarted, often using double letters later in production. Serial Number Prefix Database (Second & Third Models)
| Feature | Details | |---------|---------| | | 1871–1970s (revolvers primarily 1880s–1940s) | | Number of models | 50+ revolver variants | | Serial location | Bottom of grip frame, rear cylinder face, inside grip panels | | Numbering system | Inconsistent; often restarted at 1 for each model | | Hammer the gun | Hammer the gun → Hammer (internal vs external) | | Top-break vs solid-frame | Top-break serials are better documented |
Dating an Iver Johnson revolver requires more than just a serial number; it often involves cross-referencing mechanical design with letter prefixes that the factory used to denote specific production years. Because Iver Johnson didn't use a strictly linear numbering system across all models, you must first identify your model's "variation" to find an accurate date. Where to Find the Serial Number
The best way to identify and date an Iver Johnson revolver is through the serial number and letter prefix Iver Johnson Revolver Serial Number Database BEST
Since a searchable database doesn't exist, use these indicators to narrow down the age: 1. The Owl Head Grip
Early models or specific utility lines often have numbers stamped here.
Help identifying an Iver Johnson revolver - Northwest Firearms : Letter prefixes continued but restarted, often using
: Octagon barrel, solid frame, non-fluted cylinder.
Always remember that "safe for modern ammunition" means standard pressure loads for its original caliber. Never use +P or high-velocity rounds in these vintage firearms. If you are uncertain, have the revolver inspected by a qualified gunsmith.
Cataloging format and database structure Where to Find the Serial Number The best
Handling ambiguous or altered serials
Generally, if the revolver has no letter prefix, it was produced before 1900–1905, designed for black powder cartridges.