German Black leather pouch for flare pistol ammos, marked 1937

Wehrmacht Heer or Waffen SS Black leather pouch for flare pistol ammos, marked 1937 year Buch Müller Stuttgart as well eagle and WaA 101 stamp. Well worn condition, with cut out inside section. Seems it has been used to store something else, or soldier did not find this section useful. Anyway that's not visible if closed and OK for display. Good condition, with some unit's painted markings on the top cover