ZB vz. 37

Lore & Background

The ZB-53 was designed as a private venture by Václav Holek and Miroslav Rolčík of Zbrojovka Brno to replace the Schwarzlose machine gun of World War I origin. Czechoslovakia purchased 500 for testing under the designation Vz.35, and after improvements the ZB-53 was adopted as the TK vz. 37. It became the standard machine gun of Czechoslovak LT-35 and LT-38 tanks. Production continued at Zbrojovka Brno in large quantities until the 1950s.

The weapon was exported to Romania, Yugoslavia (1,000 pieces in March-April 1940), Argentina, Afghanistan, Iran, and China, where large numbers were used during the Second Sino-Japanese War. The United Kingdom bought a licence and produced its own version, the Besa machine gun, with over 60,000 made. Following the German invasion of Czechoslovakia, large quantities were captured and used by the Wehrmacht as the MG 37(t), and during the German occupation of the factory, large numbers were produced for the Waffen-SS until 1942.

The ZB-53 was gas-operated, belt-fed, and air-cooled. It was designed to withstand five minutes of constant fire, after which the barrel had to be changed due to wear. Although modern, the weapon was prone to jamming due to a complicated rate of fire selection mechanism.

Reader's Guide

The ZB vz. 37 was significant as a versatile machine gun that served in infantry, vehicle, and fortification roles, reflecting interwar Czechoslovak arms design. Its adoption by multiple countries—including Romania, Yugoslavia, Argentina, Afghanistan, Iran, and China—demonstrated its export success. The British licence production as the Besa machine gun, with over 60,000 units made, ensured its widespread use in Commonwealth armoured vehicles during World War II. Captured by Germany after the invasion of Czechoslovakia, it was employed by the Wehrmacht as the MG 37(t) and produced for the Waffen-SS until 1942. The weapon's legacy includes its use in the Bangladesh Liberation War by Mukti Bahini forces, sales to Biafra in 1967, and service with the Panama Defense Forces mounted on Jeeps. It was also installed as a coaxial machine gun on 38/39M light tanks in Peruvian service. Despite its jamming issues due to a complicated rate of fire selector, the ZB vz. 37 remained in production until the 1950s and influenced later designs.

Did You Know?

• The weapon was used by Mukti Bahini forces during the Bangladesh Liberation War.
• At least 20 were sold to Biafra in 1967.