Theodor, This item has Heerswaffenamt (HWaA) code WAa37 on it, so it must be associated with one of the following items which were the responsibility of the inspection office code WAa37, located at the following companies: (Item descriptions in bold added by myself.) -C.G. Haenel, Waffen und Fahrrad-Fabrik, Suhl, Th?ringen (122) : (MP 38 Submachine Gun :1940) -C.G. Haenel, Waffen und Fahrrad-Fabrik, Suhl, Th?ringen (fxo) : (P 08 Luger Pistol magazines ; MP44 Machine Pistol : 1941 - 45) -Gebr. Heller GmbH, Marienthal bei Schweina (csr) : (SG.84/98 : 1939 - 40) Bayonet -Gebr. Heller GmbH, Marienthal bei Schweina (csr) : (SG.84/98 : 1941 - 44) Bayonet -J.P. Sauer-u. Sohn, Gewehrfabrik, Suhl, Th?ringen (147) : (K98k : 1938 - 40) Rifle -J.P. Sauer-u. Sohn, Gewehrfabrik, Suhl, Th?ringen (ce) : (K98k : 1941 - 44) Rifle The Luger magazine and bayonets can be eliminated, so it appears your item was involved with lubrication of one of the weapons shown above. Cheers, Ken