Coo Coo Clock

Coo coo clock, has paper tag on it reading"Edelweiss Lador Switzerland".
Sorry about the pic being sideways, it has 3 weights indicating it was built with a music box. It coo coos once on the half hour and coo coos on the hour indicating which hour. And after it coo coos on the hour, it plays a brief rendition of Edelweiss. Would anyone know approximately what year it was built? Thanks!!