F) Covers
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Cover 1-99 (4)
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Cut Squares (70)
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e2) FDC Stamped Envelopes & Wrapper (4)
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Space Covers (2)
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Stamped Envelope & Wrappers (27)
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f) FDC Airmail (57)
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g) FDC Back of Book (12)
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h) Air Covers (37)
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i) Back of Book (129)
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j) Military Covers (51)
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m) Ship Covers (46)
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Foreign Covers (50)
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k) Cover 100-999 (76)
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l) First Flight Covers (13)
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a) FDC 230-999 (150)
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b) FDC 1000-1999 (195)
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c) FDC 2000-2999 (20)
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d) FDC 3000-3999 (7)