Zither.

Technical description: Body with flat bottom; sides commencing at 90º, before starting a non-symmetrical undulating shape, reaching a point at the top. Nine bridges, designed so that the top left hand bridge has a chord of Aminor on the left side, and is joined to another mirror-imaged bridge which forms (along with the first long angled bridge) part of the Gmajor/minor 7th bridge chord sequence section. Other bridge sections (again consisting of a small upper bridge, and a longer more angled bridge) for a B? 7th chord, C 7th chord, and Fmajor chord. The longest two strings of each chord are overstrung. Square-headed tuning-pins. Sound-hole diameter 65.5. Three brass studs into back. Soundboard thickness approximately 7. British Patent No.22,999 of 1898 claims 'a zither like instrument in which all the strings are arranged in groups of chords comprising both bass and soprano strings'; and specifies inter alia that 'the instrument is principally for the use of persons of deficient musical education enabling them to play this instrument without any difficulty by help of the known music sheets for fitting under the strings. .. the pins on the left hand edge of the instrument serve for fastening the music sheets' and describes the melodic and chordal notation intended.