1976 13¢ Spirit of '76 - 3 Varieties, Attached Plate Block

United States #1712-15 13¢ Butterflies - 4 Varieties, Attached Plate Block Varieties: #1712 - Swallowtail #1713 - Checkerspot #1714 - Dogface #1715 - Orange-Tip *Plate number and position may vary...

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 #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 #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 #1717-20 13¢ Skilled Hands - 4 Varieties, Attached Plate Block Varieties: #1717 - The Seamstress #1718 - The Blacksmith #1719 - The Wheelwright #1720 - The Leatherworker *Plate number...

United States #1683 13¢ Telephone Plate Block

United States #1685 13¢ Chemistry Plate Block

United States #1632 13¢ Interphil Plate Block

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