1940 Luther Burbank Plate Block Of 4 3c Postage Stamps - Sc# 876 - , MNH, OG
1979 - Albert Einstein Single 15c Postage Stamp - Sc# -1774 - MNH, OG - CX666a
1958 Int Geophysical Year Single 3c Postage Stamp - MNH, OG - Sc# 1107
1984 Lillian Gilbreth Psychology Pioneer Single 40c Postage Stamp - MNH, OG - Sc# 1868
1940 Pan-American Union Single 3c Postage Stamp - MNH, OG - Sc# 895
2001 Enrico Fermi - Physicist Plate Block of 4 34c Postage Stamps - MNH, OG - Sc# 3533
1944 Telegraph Centenary Single 3c Postage Stamp - MNH, OG - Sc# 924
1962 Space Project Mercury Single 4c Postage Stamp - MNH, OG - Sc# 1193 - CX213
1965 New York Worlds Fair Single 5c Postage Stamp - MNH, OG - Sc# 1244`- CX243
1997 First Supersonic Jet 1947 Single 32c Postage Stamp - MNH, OG - Sc# 3173 - DA107
1995 Alice Hamilton Block of 4 55c Postage Stamps - MNH, OG - Sc# 2940
1995 Alice Hamilton Plate Block of 4 55c Postage Stamps - MNH, OG - Sc# 2940
2015 Robert Robinson Taylor Single Forever Postage Stamp - MNH, OG - Sc# 4958
1996 Computer Technology Plate Block of 4 32c Postage Stamps - Sc# 3106 - MNH, OG - CX539
1998 Breast Cancer Single 32c Postage Stamp - Sc# B1 - MNH, OG - CX6a
1984 Health Research Block Of 4 20c Postage Stamps - Sc# 2087 - MNH, OG -CW33b
1935 California Pacific International Expo Plate Block of 4 3c Postage Stamps - MNH, OG - Sc# 773
1974 Space Skylab Single 10c Postage Stamp - Sc# 1529 - MNH - CW486a
1962 Atomic Energy Act-Brian McMahon- Single 4c Postage Stamp - Sc#1200 - MNH - CW472a
1981 Wharton Professional Management Single 18c Postage Stamp - Sc# 1920 - MNH - CW483b
1963 Alliance For Progress Single 5c Postage Stamp - Sc#1234 - MNH - CW470a
1992 Theodore Von Karman Plate Block of 4 29c Postage Stamps - MNH, OG - Sc# 2699
1949 Wright Brothers Airmail Single 6c Postage Stamp - Sc C45 - MNH, OG - CW400b
1949 Wright Bros Airmail Block Of 4 6c Postage Stamps - Sc# C45 - MNH - CW400c
