This instrument is a claviorganum, a combination of a clavichord and an organ. The organ pipes are positioned in the stand under the bottom of the clavichord. The pipes are old, but not original.
The instrument has a normal brass string scale, as other Swedish clavichords from the middle of the 18th century. By changing to iron strings in the treble it is possible to tune the instrument to the higher choir pitch of the organ
The 8-foot bridge has a flat top for the strings C ? f1, with the strings resting on small pieces of ivory perpendicular to the bridge direction and with bridge pins on the side towards the sounding part of the string. This bridge construction is similar to N57244 (Johannes Broman, 1756) and X5488 (Johan Broman, 1763), but these clavichords had pieces of wood perpendicular to the string direction and bridge pins on both sides.
As all the documented Lundholm clavichords this one has guiding pins for the strings at the left hitch pin block to ensure that all 4-foot strings are located between their two 8-foot strings and that all courses are aligned with their tangents.
The instrument was restored by Johannes Koch, Günther Hellwig and Hans Jordan, probably in 1960. An additional restoration was made by Felix Wolff in 1963.