Some pics of and inside a very good condition Yamaha YC-20 : r
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Up for sale, a 1970's Yamaha Electone YC-20 vintage combo organ in good working order. One of the most refined and versatile vintage combo organ lines
1970s Yamaha Electone YC-20 Vintage Combo Organ Keyboard Japan
Important part of broadcast history receives a sound restoration
History Of The Organ – Yamaha Music – Blog