Imperial grand horizontal piano
Imperial grand horizontal piano grand piano patented by Robert Wornum of London by 1838, with strings running underneath the soundboard (92). Harding, Rosamund E. M. The Pianoforte. Cambridge, 1933.
Imperial grand horizontal piano grand piano patented by Robert Wornum of London by 1838, with strings running underneath the soundboard (92). Harding, Rosamund E. M. The Pianoforte. Cambridge, 1933.