Good morning:
A inmediate post-war SMG, the Spanish Bonifacio Echevarria Star Z-45.
Owing a lot of its design to the german MP-40, the first models were chambered to the powerful 9x23 Largo which was the standard samall arms cartridge of the spanish armed forces and the Guardia Civil military police. Later, a folding stock model, chambered to the much more usual 9 mm Parabellum was adopted both by the spanish military and by the peruvian Guardia Civil (spanish trained) well until the late 1970s. Cheers.