Super cool vintage (but still valid) Christmas - themed U.S. Postal stamps, enough for five letters or cards in each pack. These were all produced in the 1970's:
Partridge in a Pear Tree, Santa Claus, Christmas Tree in Needlepoint, The Road - Winter by Currier and Ives, Madonna and Child with Cherubim, Santa Clause Christmas Tree Ornament, Wreath and Toys.
Chose from two different sets.