5x7 B&W vintage photograph signed in black ballpoint ink by Robert F. Christy. In great condition. (1916-2012) Robert Frederick Christy was a Canadian-American theoretical physicist and later astrophysicist who was one of the last surviving people to have worked on the Manhattan Project during World War II. He briefly served as acting president of the California Institute of Technology (Caltech).This lot came from the Jim Wiggins collection we purchased in July 2022. Jim Wiggins accumulated the most unique and valuable autograph collection over a period of 70-plus years. He obtained his collection either in person or by writing to persons of fame and notoriety.Comes with a full Letter of Authenticity from Todd Mueller Authentics.