Black Forest Clock Association

The Black Forest Clock Association (German: Verein die Schwarzwalduhr – VdS) is a syndicate that was set up in 1987 to protect traditional mechanical cuckoo clock making in the Black Forest region in Baden-Württemberg (Germany). The association issues authenticity certification (echtheitszertifikat) to members of the association.

Source: Wikipedia — Black Forest Clock Association (CC BY-SA 4.0)