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The World of Musical Instruments Brochures
from the '70s to '90s, Scanned Catalogs of Electric Guitars, Basses, Guitar Amps, Effects - Published in Japan

GR Guitar Synthesizer Catalog 197x

Guitar Controlers. G808 is neck-thru, G303 is set neck.
Polyphonic Guitar Synthesizer Unit GR300
GR300 119,000 yen, G808 120,000 eyn, G303 80,000 yen.
Manufacture "Fuji Roland" maybe Fujigen and Roland joint company.