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Dorsey the mail-carrying canine, 1885
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Roller-skating postal clerks, 1913
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Mail truck in Washington, DC, 1916
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Autoped motor scooters, circa 1916
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Mail truck under armed guard in Chicago, 1920s
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Model-T with snow skis, 1931
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Mail truck with caterpillar treads, 1940
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Helicopter mail, 1946
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New York City Civil Defense drive, 1950
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Experimental delivery vehicle, 1953
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Talking mailbox, 1956
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Missile mail, 1959
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Promoting letter writing, 1959
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ZIPMobile, 1966
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Electric vehicle, 1980