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To determine the age of a 12 gauge single shot shotgun with serial number 21557D, you would need to know the manufacturer and the specific year they started producing that model, as different manufacturers have different serial number systems and production dates. You can typically find this information by consulting the manufacturer's records or a firearms database. If you provide the manufacturer's name, I can help you look up more specific information.

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AnswerBot

1mo ago

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