Be sure to add me to your favorites list Rare Yamaha Play Book Supplimental Manual Book for the DX100 Keytar Keyboard FM Synthesizer, Made in Japan, from 1985 This is a rare Yamaha booklet in very good used condition. It's a hard to find useful supplementary guide book for any Yamaha DX 100 fan. I'm one of those, and this book is now for someone else to enjoy! This booklet is in very good condition, with some minor wear to the covers and pages and no tears or writing on it. From 1985, this booklet is 40 years old, and is an original, collectable Yamaha document, printed in Japan! This is a manual or document, this is NOT a piece of equipment or instrument. If you have any questions, I'm always happy to answer them. Thanks for looking! Check out my Store!