December 17, 2026 The Estate Of Whitefoord Cole II: Firearms & Militaria
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The live portion of this session begins on Thursday, December 17, 2026.
This company was formed just to produce this revolver that was patent on Dec. 7, 1880. They were located in Norwich, Connecticut. It was based on the LeMat principle with a cylinder that held 8 rounds of .22 short ammunition and a lower single shot barrel with in .32 RF, and used a pivoting firing pin. It is estimated that less than 300 were produced before the company folded around 1882. It is a nickel plated top break with a rib on upper barrel that has the patent date. Top of frame has the "DUPLEX" moniker and the Osgood legend is stamped on left side of the lower barrel. Square butt rosewood grips. The serial number is stamped on barrel, back of cylinder, and inside the grip frame all of which are matching. The right grip panel has a matching number written in pencil. An example of this rare revolver resides at the Smithsonian. CONDITION: Fine. Retains at least 75% of the exhibiting sundry age freckling. Mechanically sound. Both barrels are rifled and show some abrasion.
Name
Value
Barrel Length
2 - 1/2"
Caliber/Bore
.22 RF / .32 RF
FFL Status
Antique
Manufacturer
Osgood Gunworks
Model
Duplex
Serial Number
231
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