Yamaha PortaTone Owner's Manual page 29

YAMAHA
IMPORTANT
PLEASE RECORD THE SERIAL NUMBER OF YOUR UNIT IN THE
SPACE BELOW.
MODEL: PSR-200
MODEL: PSR-300
SERIAL NO:
THE SERIAL NUMBER IS LOCATED ON THE BOTTOM OF THE UNIT.
RETAIN THIS OWNER'S MANUAL IN A SAFE PLACE FOR FUTURE
REFERENCE.
YAMAHA CORPORATION
P.O.Box 1, Hamamatsu, Japan
© 1991 YAMAHA CORPORATION
VL76120 JCBBR12P06.3CP Printed in Japan