A P.38 hard shell holster made by ndk.  ndk was the German secret code for Jndustriewerke AKBA GMBH who was located in Petrikau, Poland.  These can be found undated or with a 44 date in a circle.  I have never observed a 43 but that is certainly possible.    These holsters are virtually all brown and were made with inferior leather.  The tanning process was poor and caused the leather to slough off similar to the way Civil War leather does.  The leather was also softer and thinner and thus didn't hold it's shape like most of the hard shell holsters contracted for by the Reich.  These are difficult to find in excellent or better condition. See also lyo.