One is worth about $16000, the other about $60
#83 Also known as Blackjack.
ERROR STAMP #2281 i on the left.
#480
#90 Only about 1 million issued in 1868. This one ranges in value between $450-$500.USD if certified by a reputable philatelic organization.
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#24 x 3 on an envelope (on cover).
ERROR # 515 Printing on back, as well as the front. Printing on back is under the gum.
#479 Will be submitting for certification soon.
#112 Not bad shape for being over 150 years old.