.25 ACP. 2.125" barrel length. SN: 117162. Blued metal finish with polished barrel mounting brown synthetic DUO logo grips and gutter sights. Simple blowback operated striker action autoloading pistol fed by detachable single stack magazines. Left slide legend reads AUTOMAT PISTOLE "DUO" CAL 635/F. DUSEK. OPOTSCHNO, followed by Czech firing proof and 45. Further firing proof mark to right chamber. {C&R}