Soft shell holster originaly designed for the Dutch FN BROWNING MOD 22.
It isin blackened leather. Thh closure system is typical from Dutch FN 22 holsters.
The place for the cleaning rod has been removed while the closure system has been displaced up.
The markings are placed inside the upper flap : ink CM ( = Central Magazijn which means central shop), with the assembly date = 1939; the pistol serial number (46643) is inscribed on the inside flap.
This holster is detailed in the book WW2 German Military Holsters on page 32.