The CZ DUO (originally manufactured by F. Dušek in Opočno, Czechoslovakia) is a compact, single-action, blowback-operated "vest pocket" pistol. Chambered in 6.35mm Browning (.25 ACP), it is highly sought after for its reliability and concealability. First introduced in 1926, production soared during World War II when the Nazi regime took over the Dušek factory. Post-WWII, production briefly shifted to the Česká Zbrojovka (CZ) factory under the designation "Z" pistol before transitioning into models like the CZ 45 and CZ 92. Due to their robust, Browning-inspired design, many of these historical CZ DUO pistols remain in circulation today. To explore specifications, historical valuations, or parts for vintage CZ models.