Very Unique Mechanical Tremolo | Reverb Deutschland
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Schaller opto-mechanical Tremolo TR-65 (Info in comment) : r/vintageguitarpedals
Mechanical Tremolo Does Things The Old-School Way | Hackaday
Vibrato systems for guitar - Wikipedia
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Ant Farm Music auf Instagram: „Vintage Dearmond 60B mechanical tremolo pedal repair. Everything was functioning properly, but there was no tremolo effect. The solution?…“