Danish physicist (1885–1962) who was awarded the 1922 Nobel Prize in Physics for his theory of atomic structure. Ink signature, “Nils Bohr,” on an off-white 5.75 x 3.5 sheet of Gl. Carlsberg letterhead, dated in type June 1, 1957. Matted with a portrait of Bohr, to an overall size of 10 x 17. In fine condition, with some mild toning to left edge. R&R COA.