Description
- Scott Catalog # : 5276 - 5279 / FDCO Exclusive First Day Covers.
- Set Includes: 5276 Science / 5277 Technology / 5278 Engineering and 5277 Mathematics.
- The Collectible First-Day Digital Color Postmark is an official digital postmark bearing the first-day-of-issuance-date containing an image that relates to the stamp design with the words "FIRST DAY OF ISSUE."
- The cachet (image) was made on a computer and printed on high-quality envelope.
- ARE IN MINT, UNADDRESSED CONDITION.