RARE Vintage Musical Instrument TUNER Digi-Tune 440 with co-inventor promo photo

RARE Vintage late 1970's Musical Instrument TUNER Digi-Tune 440 includes original co-inventor CHARLES SWAN playing trumpet 1979 press promo photo. Very good condition as pictured. Well made, heavy duty construction, 110 AC heavy duty power cord (not battery operated). Digi-Tune 440 has Built-In Microphone.

Accurate Musical Instrument TUNER with "normal and "fine tune modes for Guitar Bass Piano pitch training!

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