U.S Stamps Issues 501-750
U.S. Postage Stamp Number 526 Unused2¢ Washington Type IV – carmine
U.S. Postage Stamp Number 642 Used10¢ Monroe (1927) – orange
U.S. Postage Stamp Number 747 Used8¢ Zion
U.S. Postage Stamp Number 527 Unused2¢ Washington Type V – carmine
U.S. Postage Stamp Number 643 Unused2¢ Vermont
U.S. Postage Stamp Number 748 Unused9¢ Glacier
U.S. Postage Stamp Number 528 Used2¢ Washington Type Va – carmine- U.S. Postage Stamp Number 643 Used2¢ Vermont
- U.S. Postage Stamp Number 748 Used9¢ Glacier
U.S. Postage Stamp Number 528B Unused2¢ Washington Type VII – carmine
U.S. Postage Stamp Number 644 Used2¢ Burgoyne
U.S. Postage Stamp Number 749 Unused10¢ Great Smoky Mountains- U.S. Postage Stamp Number 528B Used2¢ Washington Type VII – carmine
U.S. Postage Stamp Number 645 Unused2¢ Valley Forge- U.S. Postage Stamp Number 749 Used10¢ Great Smoky Mountains
U.S. Postage Stamp Number 529 Used3¢ Washington Type III – violet- U.S. Postage Stamp Number 645 Used2¢ Valley Forge
- U.S. Postage Stamp Number 750 Unused3¢ Mt. Rainier Sheet of 6
- U.S. Postage Stamp Number 530 Unused3¢ Washington Type IV – purple
U.S. Postage Stamp Number 646 Unused2¢ “Molly Pitcher”- U.S. Postage Stamp Number 750a Unused3¢ Mt. Rainier Single
- U.S. Postage Stamp Number 530 Used3¢ Washington Type IV – purple
- U.S. Postage Stamp Number 646 Used2¢ “Molly Pitcher”
- U.S. Postage Stamp Number 750a Used3¢ Mt. Rainier Single
U.S. Postage Stamp Number 531 Unused1¢ Washington – gray green
U.S. Postage Stamp Number 647 Unused2¢ “Hawaii”
U.S. Postage Stamp Number 532 Unused2¢ Washington Type IV – carmine rose
U.S. Postage Stamp Number 648 Unused5¢ “Hawaii”
U.S. Postage Stamp Number 533 Used2¢ Washington Type V – carmine
U.S. Postage Stamp Number 649 Unused2¢ Wright Airplane
U.S. Postage Stamp Number 537 Unused3¢ “Victory & Flags” – violet- U.S. Postage Stamp Number 649 Used2¢ Wright Airplane
- U.S. Postage Stamp Number 537 Used3¢ “Victory & Flags” – violet
- U.S. Postage Stamp Number 650 Unused5¢ Globe & Plane
- U.S. Postage Stamp Number 540 Unused2¢ Washington Type III – carmine rose
- U.S. Postage Stamp Number 650 Used5¢ Globe & Plane
U.S. Postage Stamp Number 541 Unused3¢ Washington – violet
U.S. Postage Stamp Number 651 Unused2¢ George R. Clark- U.S. Postage Stamp Number 651 Used2¢ George R. Clark
U.S. Postage Stamp Number 653 Unused½ ¢ Nathan Hale – olive brown- U.S. Postage Stamp Number 653 Used½ ¢ Nathan Hale – olive brown
U.S. Postage Stamp Number 654 Used2¢ Edison's 1st Lamp
U.S. Postage Stamp Number 655 Unused2¢ Edison's 1st Lamp- U.S. Postage Stamp Number 655 Used2¢ Edison's 1st Lamp
U.S. Postage Stamp Number 656 Unused2¢ Edison's 1st Lamp- U.S. Postage Stamp Number 656 Used2¢ Edison's 1st Lamp
U.S. Postage Stamp Number 657 Unused2¢ Sullivan Expedition- U.S. Postage Stamp Number 657 Used2¢ Sullivan Expedition
U.S. Postage Stamp Number 658 Unused1¢ Franklin – green- U.S. Postage Stamp Number 658 Used1¢ Franklin – green