This instrument is unique in being the most elaborate eighteenth-century harpsichord to have come down to us. The allegorical scene painted inside ist lid – probably representing Dido and Aeneas or Paris and Helen – suggests it was intened as a royal gift. It represents a Knight in armour appearing in a cloud above the very same harpsichord being represented (presumably by Hass himself and his son) to an enthroned lady who marvels at the sight.