1978 15¢ American Owls - 4 Varieties, Attached Plate Block

United States #1749-52 13¢ American Dance - 4 Varieties, Attached Plate Block Varieties: #1749 - Ballet #1750 - Theater #1751 - Folk #1752 - Modern *Plate number and position may vary from image...

United States #1745-48 13¢ Quilts - 4 Varieties, Attached Plate Block Varieties: #1745 - Flowers #1746 - Stars #1747 - Stripes #1748 - Plaid *Plate number and position may vary from image shown.

United States #1779-82 15¢ Architecture - 4 Varieties, Attached Plate Block Varieties: #1775 - Virginia Rotunda #1775 - Baltimore Cathedral #1775 - Boston State House #1775 - Philadelphia...

United States #1928-31 18¢ American Architecture - 4 Varieties, Attached Plate Block Varieties include: #1928 - New York University Library #1929 - Biltmore House #1930 - Palace of the Arts #1931 -...

United States #2019-22 20¢ American Architecture - 4 Varieties, Attached Plate Block Varieties include: #2019 - Fallingwater Mill Run #2020 - Illinois Institution of Technology #2021 - Gropius...

United States #1732-33 13¢ Captain Cook - 2 Varieties, Attached Plate Block Varieties: #1732 - Captain Cook (Alaska) #1733 - "Resolution" (Hawaii) *Plate number and position may vary from image...

United States #1791-94 15¢ Summer Olympics - 4 Varieties, Attached Plate Block of 12 Varieties: #1791 - Runners #1792 - Swimmers #1793 - Rowers #1794 - Equestrian *Plate number and position may...

United States #1795-98 15¢ Winter Olympics - 4 Varieties, Attached Plate Block of 12 Varieties: #1795 - Skater #1796 - Downhill Skier #1797 - Ski Jumper #1798 - Hockey *Plate number and position...

United States #3906-09 - 37¢ American Scientists - 4 Varieties, Attached Self-Adhesive Plate Block Varieties include: #3906 - Barbara McClintock #3907 - Josiah Willard Gibbs #3908 - John von...