Weren’t the Israeli rigs 8mm mauser?
Some were until the surplus stock of 8mm ammo was used up from WW2. The Isrealis then converted all of them to .308... except some that they sold. Given that the belt in the gun in that pic shows .30-06 ammo, it’s definitely a gun that came in from over seas... to bad too. 1919’s are fine weapons.
Mike