2018-T1x, 2018 U.S. Christmas Seals Test Designs Sheet, R19-CSCS-4-08, reverse of sheet

2018 Test U.S. Christmas Seals

2018-T1x, 2018 U.S. Christmas Seals Test Designs Sheet, R19-CSCS-4-08

2018 Test U.S. Christmas Seals
2018 Test U.S. Christmas Seals