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Thomas Edison Historic Signed Letter In His Handwriting PSA Authenticity




Item History & Price

Information:
Reference Number: Avaluer:1335303Autograph Authentication: Professional Sports (PSA/DNA)
Original Description:
Recording history archiveThomas Edison Signed Letter In His own Handwriting. It says in part “Buchanan. A raw blank just as it comes from the press keep at ordinary temperatures for 44 hours – gains 5 grams of water.A fresh Blank heated over hot plate to 224 Fair for 44 hours lost 6 grams of water. This shows....”This is the beginning of the recording industry!!!



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