Introduced in 1926, this pistol is based on the 1906 Browning design. It has a 6-shot detachable magazine. The serial number is marked on the right side of the slide. The left side of the slide is marked with the two-line block "AUTOMAT PISTOLE 'DUO' CAL 635 / F DUSEK, OPOTSCHNO" followed by a Czech proof over "43" (during Nazi era). The basket weaved hard rubber grips are inlaid with a raised circled "DUO". Complete with brown leather holster containing a spare magazine.

Excellent with 98% original blue finish remaining with only the slightest handling marks. The grips are also excellent. The markings are highlighted in white and are clear. The action is excellent. The holster is very good with light to moderate age cracking and a small area of flaking of the flap. The stitching is tight.