Autograph letters signed by Baron von Ertmann about a new forte piano. 1 letter In lot comprising 29 letters to Johann Andreas Streicher Item Information Material Type Letter about Beethoven Record Number La6 Auction Information Auction House Sotheby's (London) Lot Number 343 Bibliographical Reference BJ auction index 1985-1995BN 1/3 Date of Sale 5/28/1986 Sender Baron von Ertmann Recipients Johann Andreas Streicher Sold to unknown Pricing Information Treasures Tracking Manuscript Estimate Price 12,500-15,000 GBP Sale Price 7500 GBP Sale Price in U.S Currency $12000.00