Scott #1109 1958 International Geophysical Year First Day Cover FDC Chicago

This United States First Day Cover (FDC) features the Scott #1109 3-cent stamp issued for the International Geophysical Year 1957-58. The cover is postmarked on the official First Day of Issue, May 31, 1958, in Chicago, Illinois. The clear circular postmark is accompanied by a "First Day of Issue" cancellation line across the block of four stamps.