Picture the Audi logo in your head. Hopefully, you’ll be seeing something along the lines of the Olympic rings. Being a company that was formed by a conglomeration of four different pre-existing entities, these circles were designed to indicate a union. And one of those circles was the German NSU Motorenwerke AG. While they produced cars for much of their life and helped to make the rotary engine famous, motorcycles were their stock-in-trade. And some would argue that the WWII 601 NSL was their finest hour. Here’s a mint example from Russia’s Mortorworld.