| Key to Cataloguing Symbols | |||
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Mint | SS | Souvenir Sheet |
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Used | PPC | Picture Post Card |
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cover | NH | Never Hinged |
| P | Proof | LH | Lightly Hinged |
| E | Essay | OG | Original gum |
| F | Forgery | RG | Re-gummed |
| R | Reprint | NG | No Gum |
| B | Block | H | Hinged |
| S | Sheet | VLH | Very Lightly Hinged |
| BK | Booklet | P | Photographed |
| BP | Booklet Pane | DG | Disturbed Gum |
| UL | Upper Left | SE | Straight Edge |
| UR | Upper Right | Spacefiller | Denotes serious fault |
| LL | Lower Left | FFC | First Flight Cover |
| LR | Lower Right | FDC | First Day Cover |
| CDS | Circle Date Cancel | CTO | Cancelled to Order |
| VG | Very Good | #1-10 | Complete Set |
| XF | Near Perfect Centering | #1/10 | Incomplete Set |
| F | Fine | ![]() |
Book |
| F+ | Perfs well clear of design | SON | Socked on Nose Cancel |
| VF | Very Fine | APP | Appearing |
| F-VF | Fine to Very Fine | E | Estimated Value of Lot |