Stamps: Paraguay Image Stanley Gibbons Scott Michel Yvert Tellier Year Face Value Description History 1664-71 2814-21 744-46 1976 U.S. post office bicentennial (set of 8 stamps+2 ss)   \ 1671 2821 A746 1976 20 g Missile mail, Regulus-I \ 1672 Bl 280 \ 1976 25 g Submarine missile mail envelope (souvenir sheet)