Acoustic Hollow Body Acoustic guitar
Spruce top, back and sides of walnut
Orville H. Gibson (1856-1918) invented the archtop guitar at the end of the 19th century.
Gibson mastered the construction principles of stringed instruments excellently and applied them to guitar building. His most radical innovation was cutting the top, back and side sheet from one piece of wood. He had applied the same principle to his groundbreaking mandolins from the 1880s. The pieces of wood were “tuned” to maximize their resonant properties. This was done by cutting and tapping the wood according to the process used by European violin makers.
The surprisingly light Style O guitars, like its mandolins, have a Neapolitan oval sound hole.