Vintage Marlin Model 31-20 - Rare Early 20-Gauge Hammerless Pump Shotgun Offered here is an exceptional survivor: a genuine early-production Marlin Model 31-20, the 20-gauge version of Marlin's classic hammerless takedown pump-action shotgun. Manufactured by Marlin Firearms Co. in New Haven, Connecticut, between approximately 1911 and 1923, this low three-digit serial number example ranks among the very first produced - a true piece of early 20th-century American shotgun history! This scaled-down pump features the desirable takedown design for easy cleaning and transport, full original patent markings, a rich blued finish, beautiful walnut stock and ribbed forend, an approximately 28-inch barrel, classic brass bead front sight, and the original black hard rubber buttpad. It displays honest, century-plus patina from a lifetime of responsible use: light scratches, handling marks, and authentic field wear on both wood and metal. Yet it remains mechanically excellent, with a bright, strong bore and smooth action - the kind of well-preserved condition collectors dream of in a gun this old. Note: The buttpad has a small chunk missing from the bottom (typical age-related wear; see photos for details). No other mechanical issues whatsoever. A scarce and highly collectible early Marlin pump - perfect for serious collectors of vintage American shotguns, pre-WWI Marlins, or hammerless pumps. This is the real deal: history you can hold.