2004 Lewis & Clark Plate Block of 4 37c Postage Stamps - Sc# 3854 - MNH - CX796
1954 Lewis & Clark Expedition Single 3c Postage Stamp - MNH, OG - Sc# 1063
1998 Klondike Gold Rush Plate Block of 4 32c Postage Stamps - MNH, OG - Sc# 3235
1999 California Gold Rush Plate Block of 4 33c Postage Stamps - MNH, OG - Sc# 3316
1992 Juan Rodriguez Cabrillo Plate Block of 4 29c Postage Stamps - MNH, OG - Sc# 2704
1949 Wright Brothers Airmail Single 6c Postage Stamp - Sc C45 - MNH, OG - CW400b
1949 Wright Bros Airmail Block Of 4 6c - Sc# C45 - MNH - CW400c
1993 Columbus Landing in Puerto Rico Plate Block of 4 29c Postage Stamps - MNH, OG - Sc# 2805
1993 Columbus Landing in Puerto Rico Block of 4 29c Postage Stamps - MNH, OG - Sc# 2805
1984 Roanoke Voyages Plate Block Of 4 20c Postage Stamps - Sc# 2093 - MNH, OG - CW34a
1978 Captain James Cook Plate Block Of 4 13c Postage Stamps - MNH, OG - Sc# 1733 - CX327
1983 Joseph Priestley Plate Block Of 4 20c Postage Stamps Sc# 2038 - MNH, OG - CW247a
1988 Arctic Explorers Block of 4 25c Postage Stamps - MNH, OG - Sc# 2386
1984 Roanoke Voyages Block Of 4 20c Postage Stamps - Sc# 2093 - MNH, OG - CW34b
1986 Arctic Explorers Plate Block Of 4 22c Postage Stamps - Sc 2220-2223 - MNH, OG - CX874
1978 Captain James Cook Plate Block Of 4 13c Postage Stamps - MNH, OG - Sc# 1732 - CX336
1978 Captain James Cook Block Of 4 13c Postage Stamps - MNH, OG - Sc# 1732, 1733 - CX336a
1968 Marquette Explorer Plate Block Of 4 6c Postage Stamps - MNH, OG - Sc# 1356 - CX346
1968 Daniel Boone Plate Block of 4 6c Postage Stamps - MNH, OG - Sc# 1357
1967 Davy Crockett Plate Block of 4 5c Postage Stamps - Sc# 1330 - MNH, OG - CX485
1959 Arctic Explorations Plate Block of 4 4c Postage Stamps - Sc# - 1128 - MNH, OG - CX689
1959 Silver Centennial Plate Block of 4 4c Postage Stamps - Sc# - 1130 - MNH, OG - CX686
1950 California Statehood Gold Plate Block of 4 3c Postage Stamps - Sc 997 - MNH - DS136b
1954 Lewis & Clark Expedition Plate Block of 4 3c Postage Stamps - MNH, OG - Sc# 1063
