Well done!
Forgotten Weapons says that Greece had FM-24, but we did definetely had Hotckiss M1922 in 6,5x54.
Strange mistake, FW is a reliable source ...
Kingdom of Greece had Chauchat LMG and Hotchkiss Model 1922 but, as you say, no Châtellerault.
In fact, before WWII, the excellent FM MAC model 24/29 was not proposed to exportation