The musical instrument pickups, effects units and amplifiers designed and manufactured
by Harry DeArmond and Bud Rowe and later by Steve Tosh in Toledo, Ohio, from the 1940s to the 1980s, through Rowe Industries Inc.,
H. N. Rowe & Company, Rowe DeArmond Inc., DeArmond Inc. and Tosh Electronics, all of Toledo, Ohio, USA.
The Hofner Ambassador archtop electric guitar was available with the option of two Model 2000 pickups with black coil formers
The Verithin archtop electric guitar was available with the option of two un-numbered DeArmond pickups shown here, as used in the three-pickup Harmony guitar models H75 and H77.