Holster bleg.

Can anyone knowledgeable about U.S. WWII GI accoutrement figure out exactly what this holster is? I know enough about belts and pouches and suchlike to say "Ayup. That looks like one o' them there holster things you got yourself, there."

(Also, as a sort of gratuitous gun pr0n bonus, there are pictures there of a Hungarian-made Jerry pistol, a Luftwaffe-issue P.37(u), which was stuffed in the holster.)