Francis Crick Signed Autographed First Day Cover FDC Cachet Scientist JSA COA. Scientist Francis Crick Signed Autographed 1973 First Day Cover FDC. Included is a COA from JSA. Crick was a British molecular biologist, biophysicist, and neuroscientist. He played a crucial role in deciphering the helical structure of the DNA molecule.Crick won a Nobel Prize in Physiology or Medicine in 1962. Very good condition for the age. This would be a Rare, unique and great addition to any collection! This item includes a Certification of Authenticity from James Spence Authentication. JSA is the leading autograph authenticator in the industry. Listing and template services provided by inkFrog.