From the fourth quarter of the 19th century, just about all piano builders adopted the cross-string system invented by Steinway & Sons in 1859-1860. Only Erard in Paris and Broadwood in London stayed true to the straight strung concept.
Erard went on the offensive with this type "Nouveau modèle, extra-grand de concert" with a length of 260 cm and a keyboard of 90 keys.
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