French Chatellerault LMG Model 1924 modified 1929 in 7.5x54 mm Mod 1929 C.
By the way, not many people know that the Brno factory was set up by French who helped the Czech establish their own weapons manufacturing facility right after WW1, the ZB 26 and ZB 30 are kinda cousins of the LMG 1924 and the Hotchkiss 1922, both derived from the CSRG 1915 Chauchat concept that did not deserve the bad reputation it got in most writings.