The octophone (or octofone) is a stringed musical instrument related to the mandola family resembling an octave mandolin.
[2] The name "Octophone" came from the idea that the instrument could take on the "tone combinations" of eight instruments, the tenor guitar, tenor banjo, ukulele, taro patch, tiple, mandolin, mandola and mandocello.
[3][4] Owners of octophones have said that the instrument is made with birch neck, neck block, sides and back and a top made of spruce.
[3][5][6] The neck is attached to the body with a 3/4 inch wooden dowel stuck into a hole in the neck block, rather than a strong joint such as the dovetail used on some guitars and mandolins.
All pitches shown here are estimates; the book the company provided (to show customers how to tune their instrument) is rare.