Cover made of hardwood, notches and bottom made of flamed maple with very regular, fine flames, thirteen tuning pegs, upper nut and bridge made for a single string and four three-chord positions, 12 frets
Graz, 1st half of 19th century, trapezoidal body with three chips made of flamed maple (?), middle brown ground and transparent covering lacquer, two oval soundholes at back, foot part continuing into two carved lions' paws, octagonal column, forty-four tunes (from D1 to e3). Signature: 'B. Straub/in/Grätz'
Vienna, c. 1840, body made of cherry wood shaped like a Biedermeier secretary bureau, at the front four columns, top part with lid on three sides, embellished with arcades, ajour, lacquered in black and lined with green fabric, a free red register with wooden resonators, from F1 to a3
Cover made of spruce, bottom in one part, made of tightly flamed maple, notches flamed maple, head shaped like a carved putto, rim of cover inlaid with five, flame-shaped soundholes, red-brown, finshed with lacquer, thirteen tuning pegs
Cover made of spruce, bottom in one part and notches made of maple with fine, regular flame pattern, red-brown, finshed with lacquer, rim of cover surrounded with meander pattern, made of mother-of-pearl and black filling compound, C-shaped soundholes, head shaped like an amorette with blindfold and wings, six times six strings
Dresden, 1801, cover made of spruce, bottom and notches of mahogany. Circular soundhole, rim of cover inlaid with angular strips of ebony and ivory, six strings, eighteen frets. Signature: 'Johann Christian Beyer fecit Dresden Ao. 1801 No. 320.'
London, 1790, rectangular body made of mahogany, structured in compartments by several kinds of woods and bands in various colours, three levers to the left of the keyboard at the beginning of the bass, from F1 to f3. Signature: 'Adam Beyer Londini Fecit 1790/Compton Street SOHO'