18 cents

1938 USA 18 cents used

$0.35

1938 18c Grant

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18 cents

1974 USA 18 cents used

$0.35

1974 18c Dr. Elizabeth Blackwell

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18 cents

1980 USA 18 cents used

$0.35

1980 -1985 Great Americans

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18 cents

1981 USA 18 cents used

$0.35

1981 Wildlife Booklet Issue

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18 cents

1981 United States 18 cents used

$0.35

Surrey, 1890s, USED

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18 cents

1981 United States 18 cents used

$0.35

18c Flag over Seacoast USED

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18 cents

1981 USA 18 cents used

$0.35

1981 18c Wildlife of America

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18 cents

1981 USA 18 cents used

$0.35

1981 18c Alcoholism "You Can Beat It!"

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18 cents

1981 USA 18 cents used

$1.00

1981 Wildlife Booklet Issue

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18 cents

1981 USA 18 cents used

$0.35

1981 Wildlife Booklet Issue

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18 cents

1981 USA 18 cents used

$0.35

1981 18c Preservation of Wildlife Habitat: Save Mountain Habitats

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18 cents

1981 USA 18 cents used

$0.35

1981 International Year of the Disabled

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18 cents

1981 USA 18 cents used

$0.95

1981 18c American Architecture

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18 cents

1981 USA 18 cents used

$0.35

1981 18c Space Achievement: Benefiting Mankind

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18 cents

1981 USA 18 cents used

$0.35

1981 18c American Red Cross Centennial

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18 cents

1981 USA 18 cents used

$0.35

1981 18c Savings and Loan Sesquicentennial

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18 cents

1981 USA 18 cents used

$0.35

1981 18c Bobby Jones

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18 cents

1981 USA 1981 18 cents used

$0.35

1981 Wildlife Booklet Issue

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18 cents

1981 USA 18 cents used

$0.35

1981 18c Flowers: Lily -

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18 cents

1981 USA 1981 18 cents used

$0.35

1981 Wildlife Booklet Issue

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18 cents

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