Muscle Cars, Full Sheet of 20 Forever Postage Stamps, USA 2013, Scott 4743-47 3rd in the America on the Move series. Collectible self-adhesive stamps, or use for postage. 4 each of 5 different designs: 1966 Pontiac GTO, 1967 Shelby GT-100, 1969 Dodge Charger Daytona, 1970 Plymouth Hemi 'Cuda, and 1970 Chevelle SS.