Victorian walnut concert grand piano by Erard of London

[Trebor84]

Looking to find out about my piano, it is a Victorian walnut concert grand piano by Erard of London, patent no. 10703, stamped G Martin to the works

[chrisw]

Patent number or serial number ? If the former I have no information and if the latter it makes your piano earlier than Victorian.

[Bill Kibby]

Mt Numbers page at pianohistor.info gives dates for Erard's London pianos, which were very different to the Paris numbers. I think that 10703 is about 1869.