I buy and resell tools, electronics, and musical equipment and got this DeArmond Tremolo Control last week! Could anyone tell me more about it? It seems extremely cool! : r/synthesizers
1940's DeArmond Electromechanical Tremolo Unit.....DeAd on DeLivery !!! - YouTube
1950s DeArmond Tremolo Control – TR Crandall Guitars
DeArmond Trem-Trol tremolo/volume pedal model 800 circa 1949, considered the first ever effect pedal for guitar, works like a champ again! #windex | By Caldera Electronics | Facebook
the tremolo effect: origins, mechanisms and improvements! | Anasounds
Late-1940s DeArmond 601 Tremolo
DeArmond Tremolo Control | Vintage Guitar® magazine