Description
- Scott Catalog # : 3238 - 3242 / Fleetwood First Day Covers.
- Set includes: 3238 Probing the Universe / 3239 Pioneering the Future / 3240 Man Among Stars / 3241 Science Fiction and 3242 Envisioning the Future.
- Have description of the stamp subject printed on the back.
- ARE IN MINT, UNADDRESSED CONDITION.