How old would a montmorillon shotgun be?

Montmorillon shotguns, produced by the French manufacturer Montmorillon, date back to the late 19th and early 20th centuries. Depending on the specific model and year of manufacture, a Montmorillon shotgun could be anywhere from around 100 to over 120 years old. To determine the exact age, one would need to reference the serial number or other identifying details specific to the firearm.