Scott Catalog # : 3061 - 3064 / Mystic First Day Cover.
Set Includes: 3061 Eadweard Muybridge / 3062 Ottmar Mergenthaler / 3063 Frederic Ives and 3064 William Dickson.
ARE IN MINT, UNADDRESSED...
Scott Catalog # : 2976 - 2979 / Mystic First Day Covers.
Set Includes: 2976 Golden Horse with Roses / 2977 Black Horse with Gold Bridle / 2978 Horse with Armor and 2979 Brown Horse with...