'Double-pedal harp made by Erard Frères, Paris, mid-nineteenth century', 1948. Artist: Unknown.
2-693-693 - The Print Collector/Heritage Images
'Double-pedal harp made by Erard Frères, Paris, mid-nineteenth century', 1948. From Musical Instruments Through the Ages, by Dr. Alexander Buchner. [Spring Books, London, 1948]