Erard: Ledger 1823-1830 (n° d'inv. D.2009.1.77) - Pianos n° 12039 to 12972 (1823 to June 1830) Here the different kinds of pianos are no longer identified by a different system of notation; Harps n° 840 to 925 and 975 to 1031 (1823 to 1826); for the n° 1030 : date of entry 10 May 1827, left the workshop 25 May 1827) – The numbers 926 to 974 do not exist. This gap is used for double-action harps. These harps were inserted between n° 691 and 741. |