| Certification | Uncertified |
|---|---|
| Grade | F/VF (Fine/Very Fine) |
| Place of Origin | United States |
| Quality | Mint Never Hinged/MNH |
| Topic | Plane |
| Type | Errors, Freaks, & Oddities |
| Country | United States / USA |
| Item Condition | Mint Never Hinged / MNH |
| EFO Type | Reverse Offset Image |
Check the listing for details. C81 - 21c Airmail Bold Reverse Offset Error / EFO Mint NH. Listed at 64.99 USD. Would make an excellent addition to your EFO / Error collection. These Occur During Production When a Sheet Misfeeds Into The Press. The Bottom Feed Roller Then Picks up the Ink Impression, and The Next Sheet/s Is Then Printed in Reverse On The Gum Side.
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