Scott Catalog # : 3987 - 3994 / Fleetwood First Day Covers.
Very Rare and Hard to Find Set!
The cachets on these FDCs are actual mint stamps that have been encapsulated in plastic.
The clear back let's you read the inscription on the reverse of the stamp.
Set includes: 3987 The Very Hungry Caterpillar / 3988 Wilbur the Pig / 3989 Fox in Socks / 3990 Maisy / 3991 Wild Thing / 3992 Curious George / 3993 Olivia and 3994 Frederick.
Have description of the stamp subject printed on the back.