#Harpsichord ca. 1650 by #JanCouchet the Elder, grandson of the famed Flemish keyboard maker Hans #Ruckers, carried on the Ruckers tradition, inheriting the workshop of Ruckers's eldest son in 1643.

This harpsichord originally had only one keyboard and one set each of unison and octave strings. In the 18thC the case was lengthened and a 2nd keyboard and a 2nd set of unison strings were added...
(notes: Benjamin Hebbert 2016)
https://www.metmuseum.org/art/collection/search/503614