This pickup is one of six attachable DeArmond pickups for roundhole guitars demonstrated in a Youtube video
The Model 260 pickup first appeared in the 1980 4-page DeArmond Inc. green ‘Catalog No. 80’ and the June, 1980 DeArmond Inc. price list. It last appeared in the 4-page DeArmond Inc. orange & black ‘Catalog No. 83’ of 1983 and the DeArmond Inc. price list dated Jan. 1, 1983.
It is an attachable humbucker pickup incorporating an integral piezo-magnetic sensor for flat-top roundhole guitars. The pickup is positioned within the soundhole by means of two fixed tabs and one spring steel tab and generally fits quite securely.
The pickup housing is of the same design as the Model 230 but with the addition of the Piezo-Magnetic Sensor (PMS).
The pickup’s technical specification was detailed in the 1983 catalog as follows:
Pickup Type: Proximity magnetic induction and contact piezoelectric,
Magnet Type: Alnico,
Mag. Strength: 750G,
Resistance: 9K Ω
Sound hole size: 3.5″ – 4.125″ (8.9-10.5mm.) Dia.