Autograph letters signed by Baron von Ertmann about a new forte piano. 1 letter In lot comprising 30 letters to Johann Andreas Streicher Item Information Material Type Letter about Beethoven Record Number La20 Auction Information Auction House Sotheby's (London) Lot Number 324 Bibliographical Reference BJ auction index 1985-1995 Date of Sale 5/21/1987 Sender Baron von Ertmann Recipients Johann Andreas Streicher Sold to unknown Pricing Information Treasures Tracking Manuscript Estimate Price 6,000-8,000 GBP Sale Price 9200 GBP Sale Price in U.S Currency $15690.00 Hammer Price 8000 GBP