This is a ros code 1944 soft shell P.38 holster.  This is a very rare example.  The ros code

is likely a very late war code change from bla, E.G. Leuner, Bautzen.  The ros code was

virtually unknown until the Russian capture items started coming into the US in the 1990s.

Today, the ros code shows up mostly on K.43 spare mag pouches.