Retro Synth Ads: Roland GR-500 Guitar Synthesizer "Each string is an orchestra" ad, International Musician 1978
1978 Fujigen/Roland GS-500/GR-500 Guitar Synthesizer Sunburst W/ Original Manual! | Reverb
Roland GR-500 For Sale - Meticulously Refurbished by Tone Tweakers Inc – Tone Tweakers Inc.
![Used ROLAND GR-500 and GS-500 SET Guitar Synthesizer SET [SN 691598 C781171] | eBay](https://i.ebayimg.com/images/g/A68AAOSwFmRj9Ylt/s-l500.jpg "Used ROLAND GR-500 and GS-500 SET Guitar Synthesizer SET [SN 691598 C781171] | eBay")
Used ROLAND GR-500 and GS-500 SET Guitar Synthesizer SET [SN 691598 C781171] | eBay
Roland GS-500 GR-500 Vintage Analog 1977 Guitar Synthesizer Controller
Retro Synth Ads: Roland GR-500 guitar synthesizer "Play me a rainbow" ad, International Musician 1978
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1977 | Roland GR500: Overview – Rob OReilly | Expressiv MIDI Guitars
Roland GS-500 GR-500 Vintage Analog 1977 Guitar Synthesizer Controller
