Erard made his first square pianos in Paris, France, in 1777. Erard history after 1914 is one of decline. Not only did the company feel the effect of two world wars and the Great Depression, but German and American pianos are also presented a new ideal in piano making. Another great French maker, Pleyel, joined this consortium in 1961. In 1971 the Schimmel Company acquired the rights to the Erard name, together with Gaveau and Pleyel.

Dates and serial numbers when the pianos were manufactured