 It is believed that the ZB factory turned more than 120,000 ZB-26 guns between 1926 and 1939 in a variety of calibers (the most popular being its original 7.92×57mm Mauser).It was exported to twenty-four European, South American and Asian countries, both in its original form and in the slightly improved ZB-30 version.Large batches of ZB light machine guns went to Bolivia, Bulgaria, China, Romania, Turkey and Yugoslavia.