ALS signed “Edison,” one page, lightly-lined, 5 x 7, no date. Memo to his lab supervisor S. A. Moore. In full: “When you find the shortest time steam can be left on in curing condensite in press—let me know. I believe by adding more 6/4 I can reduce it still further—” Suede matted and framed with a color portrait of Edison, and a small name plaque, to an overall size of 21.5 x 19.5. In fine condition, with uniform toning, and light bisecting folds. Pre-certified PSA/DNA and RRAuction COA.
This item is Pre-Certified by PSA/DNA
Buy a third-party letter of authenticity for
$75.00
*This item has been pre-certified by a trusted third-party authentication service, and by placing a bid on this item, you agree to accept the opinion of this authentication service. If you wish to have an opinion rendered by a different authenticator of your choosing, you must do so prior to your placing of any bid. RR Auction is not responsible for differing opinions submitted 30 days after the date of the sale.
