Nobel Prize-winning German physicist (1858-1947) who pioneered the understanding of quantum theory. Marvelous and rare vintage 5.75 x 8 portrait photo of Max Planck by the German portrait photographer Wanda von Debschitz-Kunowski, affixed to the original 9.25 x 12 studio mount, which is signed in the lower border in crisp black ink, “Dr. M. Planck.” The mount is also signed by the photographer, whose stamp is present on the reverse. In very good to fine condition, with light silvering to the edges of the image, corner creases, and two old tape stains to the mount. Photographs signed by Planck remain considerably rare, especially examples of this larger size.
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