The German Kriegsmarine exist only for 10 years between 1935-1945. It has his historical background in the Prussian Navy who was introduced in 1848. The evolution wasn't so quick so an Imperial Sailor could easily recognise a sailors Equipment about 100 years later. If you compare equipment over this many years you will se how that small the changes really are. Officer and NCOs could have their equipment from clothing depots or buy private with better quality. There is one of the major reasons to all variations of manufactures and its understandable that a manufacture under occupation not will put his name inside the enemy�s equipment. A lot of items are not labelled with the manufacturer. "Ohne hersteller" as they say in Germany.