Original U.S. Civil War Nickel Plated Whitney 2nd Model 2nd Type .31cal Pocket Percussion Revolver - Serial 9491 MP 44 so it possibly is oil

so it possibly is oil tempered

It was used by the Imperial Japanese Army (IJA) during the Second Sino-Japanese War

were all exclusively engaged in medical care activities

and shows wear and patination

Original U.S. Civil War Nickel Plated Whitney 2nd Model 2nd Type .31cal Pocket Percussion Revolver - Serial 9491 MP 44 so it possibly is oilOriginal Item: Only One Available. Here is a very nice nickel plated . 31 caliber percussion revolver with a fluted five shot cylinder made by the famous Eli Whitney company in New Haven, Connecticut. Designated the Whitney Pocket Model Revolver, this type revolver is a 31 caliber sidearm of which a total of 32,500 such handguns were produced at the Whitneyville Armory manufacturing center in the Whitneyville section of New Haven, Connecticut from