Recipient of the first Nobel prize for physics in 1901 and the discoverer of X-rays. His achievement heralded the age of modern physics and transformed medical practice. Unsigned ANS in German, on one of his personal university calling cards, 4 x 2.5, no date. Unsigned note reads in full, “Regrets not to be able to accept your invitation.” Accompanied by an original unsigned postcard portrait of Roentgen. In fine condition, with a bit of light toning and some scattered silvering to portrait. COA John Reznikoff/PSA/DNA and R&R COA.
