A11

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

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

1999 John and William Bartram, Botanists Plate Block Of 4 33c Postage Stamps - Sc 3314 - MNH - DM135

1984 Health Research Block Of 4 20c Postage Stamps - Sc# 2087 - MNH, OG -CW33b

1982 Architecture Single 20c Postage Stamp (Dulles) - Sc# 2022 - MNH - CW482c

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 Bros Airmail Block Of 4 6c Postage Stamps - Sc# C45 - MNH - CW400c

1995 Antique Automobiles Cars Strip Of 5 32c Postage Stamps - Sc# 3019-3023, MNH, OG - CW354

1996 Breast Cancer Awareness Plate Block of 4 32c Postage Stamps - MNH, OG - Sc# 3081

1996 Smithsonian Institution Plate Block of 4 32c Postage Stamps - MNH, OG - Sc# 3059

1996 Ernest E. Just Black Heritage Single 32c Postage Stamp - Sc# 3058 - MNH, OG - CW361a

1996 Pioneers of Communication Plate Block of 4 32c Postage Stamps - MNH, OG - Sc# 3061 3064

1978 Photography Block Of 4 15c Postage Stamps - Sc# 1758 - MNH, OG - CT79a

1992 Theodore Von Karman Block of 4 29c Postage Stamps - MNH, OG - Sc# 2699

2008 American Scientists Cori, Pauling, Hubble, Bardeen Strip Of 4 41c Postage Stamps - Sc# 4224-4227 - DR136

1985 Rural Electrification Admin Plate Block Of 4 22c Postage Stamps - MNH, OG - Sc#2144

1998 Cure Breast Cancer Plate Block Of 4 32c+8c Postage Stamps - Sc# B1 - MNH, OG - CX6