1997 First Supersonic Jet 1947 Plate Block Of 4 32c Postage Stamps - MNH, OG - Sc# 3173 - DA107
1973 Progress In Electronics Plate Block of 4 6c Postage Stamps - MNH, OG - Sc# 1500
1972 Osteopathic Medicine Block of 4 8c Postage Stamps - MNH, OG - Sc# 1469
1973 Progress In Electronics Plate Block Of 4 8c Postage Stamps - Sc# 1501 - MNH, OG - CX561
1947 The Doctor Plate Block of 4 3c Postage Stamps - MNH, OG - Sc# 949
1946 Smithsonian Institution Plate Block of 4 3c Postage Stamps - MNH, OG - Sc# 943
1940 Jane Addams Single 10c Postage Stamp - Sc# 878 - MNH,OG
1944 Motion Pictures 50th Anniversary Block Of 4 3c Postage Stamps - Sc# 926 - MNH - CV40
1984 Lillian Gilbreth Psychology Pioneer Block of 4 40c Postage Stamps - MNH, OG - Sc# 1868
1982 Robert Millikan, Nobel Physicist Block of 4 37c Postage Stamps - MNH, OG - Sc# 1866
1982 Knoxville World's Fair Plate Block Of 4 - MNH, OG - Scott# 2006-2009 - DS179a
1984 Health Research Plate Block Of 4 20c Postage Stamps - Sc# 2087 - MNH, OG -CW33a
1983 Science & Industry Plate Block of 4 20c Postage Stamps - MNH, OG - Sc# 2031
1980 Architecture Plate Block Of 4 15c Postage Stamps - Sc# 1838-1841 - MNH, OG - CW22a
1981 Architecture Plate Block Of 4 18c Postage Stamps - Sc# 1928-1931 - MNH, OG - CW12a
1982 Architecture Plate Block Of 4 20c Postage Stamps - Sc 2019-2022 - MNH - CW482b
1982 Architecture Block Of 4 20c Postage Stamps - Sc 2019-2022 - MNH - CW482a
1981 Architecture Block Of 4 18c Postage Stamps - Sc# 1928-1931 - MNH, OG - CW12
1980 Architecture Block Of 4 15c Postage Stamps - Sc# 1838-1841 - MNH, OG - CW22b
1977 Centennial Of Sound Recording Plate Block Of 4 13c Postage Stamps - MNH, OG - Sc# 1705 - CX341
1976 Clara Maass Block Of 6 13c Postage Stamps - Sc# 1699 - MNH, OG - CT43b
1976 Chemistry Plate Block of 4 13c Postage Stamps - MNH, OG - Sc# 1685
1978 Photography Plate Block Of 12 15c Postage Stamps - Sc# 1758 - MNH, OG - CT79b
1968 Hemisfair '68 - Plate Block Of 4 6c Postage Stamps - MNH, OG - Sc# 1340 - CX295
