This is a Gastine Renette howdah pistol. The bore is about .620 and rifled. This is a semi-auto two shot. Which ever hammer is cocked goes and if both are cocked they go one at a time with two pulls of the same trigger. Must have some interesting lock work. Proof that O&U guns with selective single triggers are not a new idea. Wish I knew some history on this one. It is a great maker and in good shape but I haven't shot it and won't.

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