This is an original Yamaha disk recorder Dec-20 owner's manual that can be used with Clavinova pianos. It is written in both English and German languages for easy understanding. The manual contains detailed information on how to use the disk recorder and all features that come with it.

The manual is compatible with vintage electronics and parts, making it a must-have for any collector or enthusiast. It is a great addition to your collection, whether you are a musician or simply interested in vintage electronics. Get your hands on this rare find today!