According to Kevin Marti's " Mustang, By the Numbers" (1967-73), in 1969 an exterior color code 4 (silver jade) with interior color code 3W= (White Interior), 1,300 FB's where produced. Now, with the 3W Interior, its states "Mach 1/Sports Decor" interior.
FB, I'm thinking includes the Non-Mach 1 Sportsroofs as well....Hope these figures help.