The clavichord is made in the Hamburg tradition. The keyboard layout is made as for a fretted clavichord, but closer inspection shows that it is unfretted.

This can also be found in clavichords by Johan Christoph Fleischer (see Clavichord International Vol.3 No.1 May 1999, pp. 4-11: Lance Whitehead, The Clavichords of Johan Fleischer the Younger).