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Stamps through:
1847-1850
1851-1875
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Manual letter routing A very high percentage of mail was routed manually at the time these stamps were issued. Over the ensuing 20 years, a high percentage of the mail now is routed automatically. The barcoding on envelopes is a visible sign of such automation. |
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Topics: Postal Service (105) Woman (621)
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the history of the United States
