This
instrument is based on a clavichord from the collections at
the Museum of Music in Stockholm (archive no: MM 1956/57 26)
signed "Phillipp Jacob Specken instrumentmakare in Stockholm
1743". The keyboard is enlarged to a chromatic compass
of five octaves after an idea by Hans Erik Svensson, Stockholm.
The naturals have ebony toppings and the sharps are bone topped.
The instrument has a complete brass strings register.