Manufacturer:

  • František Dušek, Opočno, Czechoslovakia
  • Model: DUO Automat Pistole
  • Caliber: 6.35mm Browning (.25 ACP)
  • Type: Semi-automatic, single-action blowback pistol
  • Production Years: Circa 1937–1949
  • Design Features:
  • Compact vest-pocket size
  • Thumb safety and magazine safety
  • Typically fitted with bakelite grips marked "DUO"
  • Used for civilian self-defense; not a military-issued weapon

The DUO Automat Pistole Cal. 6.35 is a compact, semi-automatic pistol manufactured by František Dušek in Opočno, Czechoslovakia, during the late 1930s through the 1940s. Chambered in .25 ACP (6.35mm Browning), it features a blowback action and was designed primarily for civilian self-defense. Its small size and simple mechanics made it a popular "vest pocket" pistol. The grips typically bear the "DUO" branding, and the frame is marked with the manufacturer's name and location. Though not a military-issued weapon, its wartime-era production and Czech craftsmanship make it a sought-after collectible among vintage firearm enthusiasts.