Mailing envelope, 6 x 3.5, bearing two Luxembourg postage stamps, signed in the lower right corner in fountain pen, “Allo Achtung! Albert Einstein.” Remainder of envelope bears a pencil–written statement of provenance stating, “Prof. Albert Einstein arrived from Bermuda and autographed Luxembourg Charity Stamps at Gimbels Stamp Dept.” Bisecting vertical fold and a few minor wrinkles, otherwise fine condition. R&R COA.
