Original Torpedo Bicycle Wrench (& Bottle Opener)
Period Torpedo bicycle wrenches or bottle opener. Torpedo made all of the rear hubs used on every Wehrmacht truppenfahrrad. It is also one of the best known brands to come out of Germany. This wrench has most of what you need to maintain your bike (or at least the bits of it made by Torpedo) and would be kept in your tool pouch. It also doubles as an effective bottle opener.
These could be war time or post war; there isn't any way to tell. Torpedo was widely used before, during, and after the war because they make very good parts.
Price is for one. They show some wear and light rust but are still usable. They may vary slightly, but all are marked "Torpedo." Wrenches measure about 4 3/8" long.