EINSTEIN, ALBERT. Postcard signed and dated ("Albert Einstein 1925"). N.p., 1925. 136 x 88 mm. (5 3/8 x 3½ in.), unused, with photographic reproduction measuring 71 x 57 mm. (2 13/16 x 2¼ in.) mounted above signature. A candid full-length portrait of Einstein standing with two women.