F-15A Eagle Jul 18, 2013 12:43:03 GMT -7 Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by Robert on Jul 18, 2013 12:43:03 GMT -7 Early contract numbers for 1977 were "A" models, later in 1977 the contracts switched to "C" models. There were no major visual differences, other than the tail numbers.