German: German Mfg. (non-P08) Pistols & Holsters.
Some pictures of a Sauer 38H. Hope someone will be able to decipher the owners name, rank, and address under holsters flap.
The only "J" that might appear the pistol is on the bottom of the safety. I say "might" as I am not sure if it is a J or not. Could be a heavy stamp to the base...