Watch List notes:

de Forest, Lee (1873-1961). American inventor and early pioneer in radio and in the development of sound-on-film recording used in motion pictures, inventor of the Audion vacuum tube, the first practical amplification device -- a foundation for the field of electronics. Document Signed "Lee de Forest". American DeForest Wireless Telegraph Company (ME) stock certificate for 100 shares signed below in pale brown by de Forest as President, Sept. 6, 1906. Number 39651 issued to an O. Bamberger. American eagle vignette, black borders, brown frame. Light stain, soiling at fold creases, small split top edge at fold line. Fine-About VF. Ex Spink-Smythe Sale 280, June 18, 2008, lot 74..

Estimate: $250 - $350