117-T5x, 2017 U.S. Christmas Seals Test Designs Sheet, R18-CSCS-4-16, reverse of sheet

2017 U.S. Christmas Seals

117-T5x, 2017 U.S. Christmas Seals Test Designs Sheet, R18-CSCS-4-16, reverse of sheet
2017 U.S. Christmas Seals
2017 U.S. Christmas Seals