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12mm Pinfire Cartridge

Size: 12mm
Headstamp: blank
Manufacturer: A&W - Allen & Wheelock - Grafton, Massachusetts, United States
Additional Info: Identified as A&W by the pin diameter of .087 inches. "U.S. Length" used durring the Civil War by Ethan Allen, C.D. Leet and others based on Sharps patent which called for a metal plate in bottom of cartridge for strength. Other than the pin diameter this has very similar characteristics to the other Ethan Allen ones.
picture of Allen & Wheelock pinfire cartridge