The name “Apollo” derives from Nikon’s association with NASA during the Apollo space program when Nikon supplied both test equipment and equipment to be used on flights. The APOLLO Nikon F bodies all had serial numbers beginning with 72*** and 73*** and a few rare ones 74*** and were the very latest and greatest of the amazing and truly iconic F generation (incorporating improvements as a result of years of professional feedback). F cosmetics changed late in production to match the then currently produced and just introduced F2. The Apollo F was updated with a plastic tipped F2 type advance lever and self timer, and stronger camera strap eyelets. Earlier Apollos had the standard F flash connection, later ones had the F2 type threaded PC connection.