Fountain pen signature in German (translated), "Max Planck, 3.8.38, and Marga, on a friendly summer's day!,” on an off-white 4.5 x 1.25 slip clipped from a guest book, affixed to a larger sheet captioned in another hand (translated): "Entry in our guestbook from Rohbognerhof where we had Max and Marga so often with us." Matted with a photo to an overall size of 7.75 x 11.75. In fine condition, with writing showing through from the reverse.
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