Ink ‘umbrella’ signature, “Thos. A Edison,” on an off-white 2.5 x 1.75 card. Suede matted with a photo of the inventor to an overall size of 9 x 12. In fine condition, with an overall shade of toning. Accompanied by an Edison Laboratory envelope postmarked October 28, 1926. Pre-certified PSA/DNA and RR Auction COA.
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