Stamps of United States, 29 Mar 2001
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postage
2001, Mar 29 Pan American inverts unwmk (no perf info)
| - | 1c | multi | Inverted Fast Lake Navigation | |||
| - | 2c | multi | Inverted Empire state Express | |||
| - | 4c | multi | Inverted Electric Automobile in Washington | |||
| - | 80c | multi | buffalo |
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