Golden Era Piano Museum. - "Sebastien Erard" 90 note Grand Piano-Forte c1886. France. Érard's grand piano action (English patent no 4,631, 1821) is the predecessor to those used in modern grands, the
![Harp Signed by Sebastian Erard's Patent Harp N. 881 N. 18, 1808-1809 at 1stDibs | sebastian erard harp Harp Signed by Sebastian Erard's Patent Harp N. 881 N. 18, 1808-1809 at 1stDibs | sebastian erard harp](https://a.1stdibscdn.com/harp-signed-by-sebastien-erards-patent-harp-n-881-n-18-1808-1809-for-sale/1121189/f_196965921593852256550/19696592_master.jpg?width=768)
Harp Signed by Sebastian Erard's Patent Harp N. 881 N. 18, 1808-1809 at 1stDibs | sebastian erard harp
![Portrait of Sébastien Érard (1752-1831) a French instrument maker, who specialised in the production of Pianos and harps. Dated 19th Century Stock Photo - Alamy Portrait of Sébastien Érard (1752-1831) a French instrument maker, who specialised in the production of Pianos and harps. Dated 19th Century Stock Photo - Alamy](https://c8.alamy.com/comp/H3WM0T/portrait-of-sbastien-rard-1752-1831-a-french-instrument-maker-who-H3WM0T.jpg)