How old is a monarch machine gun double barrel shotgun serial 37504 Barrel number 8902 and worth?

To determine the age of a Monarch double-barrel shotgun with serial number 37504 and barrel number 8902, you would need to research specific production records or historical data related to the Monarch brand, as there may be variations depending on the manufacturer. Generally, many double-barrel shotguns were produced in the late 19th to early 20th centuries. The value of such a shotgun can vary significantly based on its condition, rarity, and market demand, typically ranging from a few hundred to several thousand dollars. For an accurate appraisal, consulting a firearms expert or a reputable auction house is recommended.