U.S. #5211 Total Eclipse of the Sun, PNB of 4

U.S. #5211 Total Eclipse of the Sun, PNB of 4
    U.S. #5211 Total Eclipse of the Sun, Plate Block of 4

    In the first U.S. stamp application of thermochromic ink, the Total Solar Eclipse stamps reveal a second image when the ink is activated by the heat of a thumb touching the stamp image


    Code: USPB5211*Counter
    Price: $7.20
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    U.S. #5211 Total Eclipse of the Sun, PNB of 4 U.S. #5211 Total Eclipse of the Sun, PNB of 4