Mailing envelope, 6.5 x 3.75, with a Menlo Park, New Jersey, cancellation stamp dated June 5, 1929, signed in pencil “Thos. A. Edison.” Nicely double cloth matted and framed with a souvenir copy of Edison’s 1880 letter proclaiming his electric light a success, to an overall size of 15.5 x 20.5. In fine condition. R&R COA.
