See pictures for condition. The enamel has one place where it feels like it is a little bubble.

This is a vintage ADAC (Allgemeiner Deutscher Automobil-Club) German automobile club car grille badge, specifically a rare "Freiwilliger Kameradschaftsdienst" (Voluntary Comradeship Service) enamel metal plaque.

The badge is a two-part construction, designed to be mounted on a car's front grille.

It is an early example, likely from the 1950s.

The text "Eigentum Des A.D.A.C." ("Property of the ADAC") is often found on the reverse side of such badges.

The item is considered a collectible for enthusiasts of German car badges and automobilia.