This type of instrument seems to have been developed by Bartolomeo Cristofori and continued to be built throughout the 18th century. It has a single case, like no. 1, but with no illusion of inner-outer construction. The five octave version has enough notes to accommodate all the sonatas of Domenico Scarlatti. This is a large instrument of the type intended to accompany ensembles. Its extended range makes it extremely versatile for both continuo and solo playing.
All models have two eight foot stops and are entirely strung in brass.
The natural keys are covered with boxwood and the accidentals are walnut topped with ebony. The case exteriors are painted and the interiors are waxed cedar or cypress. The stand consists of two pedestals with turned legs. Other stands, key coverings, and painted or gilded decorations are also available.