Description
- Scott Catalog # : 4227a / Oversized Fleetwood First Day Cover.
- Strip includes: 4224 Gerty Cori / 4225 Linus Pauling / 4226 Edwin Hubble and 4227 John Bardeen.
- Envelope Measures 6" x 9" and have description of the stamp subject printed on the back.
- IS IN MINT, UNADDRESSED CONDITION.