Rare – Huge Auto Union Horch / Audi Service Showroom Sign. Vintage enamel metal sign from the German Auto-maker Auto-Union Horch which later formed into Audi. Horch was one of four German car brands that merged to create Auto Union, the other being Audi, DKW and Wanderer. They adopted the logo of four intertwined circles to represent the four brands, a logo retained by the current company Audi. Horch was the segment of the union that focused exclusively on top-of-the-line luxury cars. Dimensions: Height 86 cm x Length 61 cm x Depth 3 cm. (Extra Large – Dealership / Showroom Size). This is a Pre-owned Auto Union Horch Dienst Sign that shows signs of natural wear and aged patina. This is a Large and collectable size sign ideal for showroom or enthusiasts display.