117-T4x, 2017 U.S. Christmas Seals Test Designs Sheet, R18-CSCS-4-15, reverse of sheet

2017 U.S. Christmas Seals

117-T4x, 2017 U.S. Christmas Seals Test Designs Sheet, R18-CSCS-4-15
2017 U.S. Christmas Seals
2017 U.S. Christmas Seals