Louisiana Purchase Exposition Issue

Catalog codes:
- Stamp Number: US 324
- Yvert et Tellier: US 160
- Michel: US 155
- Stanley Gibbons: US 331
Emission: Commemorative
Perforation: 12
Printing: Recess
Colors: Carmine
Number issued: 193,000,000
Face value: 2¢ - United States cent

Reference
Colnect.com