The Harptone company was a commercial successor to the Felsberg Company (circa 1893). During the 1930s, Harptone was more known for musical instrument accessories, although a few guitars were built between 1924 and 1942.
In the 1960s, The Harptone Manufacturing Corporation was located at 127 South 15th Street in Newark, NJ (07107) and Harptone's main guitar designer at the time was Stan Koontz (who also designed Standel and his own signature guitars). Harptone's guitar product line consisted of mainly flattop acoustics, electric archtops, and electric basses. Harptone instruments were built between 1966 and the mid-1970s when the company went out of business.
When Micro-Frets closed operations in Maryland in either 1974 or 1975, the company assets were purchased by David Sturgill. Sturgill, who served as the company president of Grammer Guitars for three years, let his sons John and Danny gain access to leftover Micro-Frets parts. In addition to those parts, they had also purchased the remains of the Harptone guitar company. The two assembled a number of solid body guitars which were then sold under the Diamond-S trademark. Unfortunately, that business venture did not catch on, and dissolved sometime in 1976. For further information regarding Harptone acoustic models, please refer to the Blue Book of Acoustic Guitars. Company history courtesy Tom Wheeler, American Guitars.
Guitars previously built in Newark, NJ between 1966 and the mid-1970s.

HARPTONE Electric Guitars Models

HARPTONE 400 BASS Image

HARPTONE 400 BASS

- semi-acoustic maple body, 19-fret rosewood fingerboard, adjustable metal bridge, Grover tuners, single DeArmond pickup, volume/tone controls, 16 in. body width, 1.75 in. body thickness, 30.5 in. scale, mfg. late 1960s-early 1970s.

HARPTONE 520 Image

HARPTONE 520

- maple top/back/sides, 21-fret rosewood fingerboard, adjustable metal bridge, three-per-side Grover tuners, two D'Armond pickups, volume/tone controls, pickup selector switch, 16 in. body width, 1.75 in. body thickness, 24.625 in. scale, m...

HARPTONE 550 S Image

HARPTONE 550 S

- spruce top, maple back and sides, 21-fret ebony fingerboard, three-per-side Grover tuners, adjustable metal bridge, two D'Armond pickups, volume/tone controls, pickup selector switch, 16 in. body width, 3 in. body thickness, 24.625 in. sc...

HARPTONE 811 Image

HARPTONE 811

- maple top, back, and sides, 21-fret ebony fingerboard, three-per-side Grover tuners, adjustable metal bridge, two D'Armond pickups, volume/tone controls, pickup selector switch, 17 in. body width, 3.25 in. body thickness, 24.625 in. scale...

HARPTONE 910 Image

HARPTONE 910

- spruce top, maple back and sides, 21-fret ebony fingerboard, three-per-side Grover tuners, adjustable metal bridge, two D'Armond pickups, volume/tone controls, pickup selector switch, gold-plated hardware, 17 in. body width, 3.25 in. body...

HARPTONE 1000 Image

HARPTONE 1000

- spruce top, maple back and sides, 21-fret ebony fingerboard, three-per-side Grover tuners, adjustable wood bridge, single D'Armond pickup, volume/tone controls, gold-plated hardware, 18 in. body width, 3.25 in. body thickness, 24.625 in....