Pidault & Tevis type 1857-58 system revolver. Barrel with six shots in gauge 11 mm Pidault with central percussion. No visible hallmark. Barrel with rifled sides with blued remains. Recessed cylinder modified by central percussion plate. Walnut grips. Ejector rod screwed into stock. Slight problems with some of the springs, making the indexing not very accurate when cocked. Rare piece.