1931 The 150th Anniversary of the Death of General Casimir Pulaski, 1748-1779

Stamp 547
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red

1931 The 50th Anniversary of the American Red Cross Society

Stamp 548
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black/red

1931 Surrender of Cornwallis at Yorktown

Stamp 549
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carmine rose/black
Stamp 549a
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lake/black
Stamp 549b
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dark lake/black