| AR |
Postal Fiscal |
| B |
Semi Postal |
| BK |
Booklets: Panes & Covers |
| C |
Air Post |
| CB |
Air Post Semi-Postal |
| CBO |
Air Post Semi-Postal Official |
| CE |
Air Post Special Delivery |
| CF |
Air Post Registration |
| CL |
Air Post Semi-Official |
| CLEU |
Scadta Stamps |
| CM |
R.F. Overprints |
| CO |
Air Post Official |
| CP |
Commemorative Panels |
| CQ |
Air Post Parcel Post |
| CVP |
Computer Vended Postage |
| CVUX |
Computer Vended Postal Cards |
| D |
Pneumatic Post |
| E |
Special Delivery |
| EB |
Semi-Postal Special Delivery |
| EO |
Special Delivery Official |
| EP |
Encased Postage Stamps |
| EY |
Authorized Delivery |
| F |
Registration Stamps |
| FA |
Certified Mail |
| FX |
Registry Exchange Labels |
| GY |
Marine Insurance |
| H |
Acknowledgment of Receipt |
| I |
Late Fee |
| IRC |
International Reply Coupons |
| J |
Postage Due |
| JQ |
Parcel Post Postage Due |
| K |
Offices In China – Shanghai |
| L |
Local Stamps |
| LB |
Carrier’s Stamps |
| LO |
Carrier’s Stamps |
| LOX |
Official Seals |
| LU |
Local Stamps |
| M |
Military |
| MH |
Machin Head – Great Britain |
| MQ |
Military Parcel Post |
| MR |
War Tax |
| N |
Occupation – Regular Issues |
| NB |
Occupation – Semi-Postal |
| NC |
Occupation – Air Post |
| NCB |
Occupation Air Post Semi-Postal |
| NCE |
Occupation Air Post Special Delivery |
| NE |
Occupation – Special Delivery |
| NIMH |
Machin Head – Northern Ireland |
| NJ |
Occupation – Postage Due |
| NO |
Occupation – Official |
| NP |
Occupation – Newspaper |
| NRA |
Occupation – Postal Tax |
| NRAJ |
Occupation – Postal Tax Due |
| NSC |
Numismatic Souvenir Cards |
| O |
Official Stamps |
| OA |
Perforated Official Stamps – Perfin |
| OAC |
Perforated Official Air Post Stamps – Perfin |
| OAE |
Perforated Official Special Delivery Stamps – Perfin |
| OC |
Perforated Official Air Post Stamps – Perfin |
| OCE |
Perforated Official Special Delivery Stamps – Perfin |
| OX |
Official Seals |
| OXA |
Official Seals |
| OXF |
Official Seals |
| OY |
Life Insurance |
| PC |
Postage Currency |
| PN |
Postal Note Stamps |
| PR |
Newspaper & Periodical Stamps |
| PS |
Postal Savings |
| Q |
Parcel Post |
| QE |
Special Handling |
| QI |
Postal Insurance |
| QO |
Parcel Post – Official |
| QRA |
Parcel Post – Postal Tax |
| QY |
Parcel Post Authorized Delivery |
| R |
Revenue Stamps: General & Documentary Stamps |
| RA |
Postal Tax |
| RAB |
Postal Tax Semi-Posta |
| RAC |
Air Post Postal Tax |
| RAJ |
Postal Tax Due |
| RB |
Revenue Stamps: Proprietary |
| RC |
Revenue Stamps: Future Delivery |
| RD |
Revenue Stamps: Stock Transfer |
| RE |
Revenue Stamps: Cordials & Wines |
| REA |
Revenue Stamps: Beer |
| REF |
Revenue Stamps: Fermented Fruit Juice |
| RF |
Revenue Stamps: Playing Cards |
| RG |
Revenue Stamps: Silver Tax |
| RH |
Revenue Stamps: Cigarette Tubes |
| RI |
Revenue Stamps: Potato Tax |
| RJ |
Revenue Stamps: Tobacco Sale Tax |
| RJA |
Revenue Stamps: Narcotic Tax |
| RJM |
Revenue Stamps: Marihuana Tax |
| RK |
Revenue Stamps: Consular Service Fee |
| RL |
Revenue Stamps: Customs Fee |
| RO |
Revenue Stamps: Private Die Match Stamps |
| RQ |
Revenue Stamps: Unemployment Insurance Stamps |
| RS |
Revenue Stamps: Private Die Medicine Stamps |
| RU |
Revenue Stamps: Private Die Proprietary |
| RV |
Revenue Stamps: Motor Vehicle Use |
| RVB |
Revenue Stamps: Boating Stamps |
| RVC |
Revenue Stamps: Camp Stamps |
| RVT |
Revenue Stamps: Trailer Permit |
| RW |
Revenue Stamps: Hunting Permit Stamps |
| RX |
Revenue Stamps: Distilled Spirits Excise Tax |
| RY |
Revenue Stamps: Firearms Transfer |
| RZ |
Revenue Stamps: Rectification |
| S |
Franchise |
| SC |
Souvenir Cards |
| SMH |
Machin Head – Scotland |
| SP |
Souvenir Pages |
| T |
Telegraph Stamps |
| TO |
Telegraph – Official |
| TS |
Treasury Savings Stamps |
| U |
Stamped Envelope & Wrappers |
| UC |
Air Post Stamped Envelopes & Air Letter Sheets |
| UO |
Postal Savings Envelopes |
| UX |
Postal Cards |
| UXC |
Air Post Postal Cards |
| UY |
Postal Cards |
| UZ |
Official Postal Cards |
| W |
Stamped Envelope & Wrappers |
| WMMH |
Machin Head – Wales & Monmouthshire |
| WO |
Official Envelopes & Wrappers |
| WS |
War Savings Stamps |
| WV |
Sanitary Fair Stamps |
| WX |
Christmas Seals |
| X |
Postmaster’s Provisionals |
| XU |
Postmaster’s Provisionals |
| Z |
Prefecture Postage – Japan |
| ZB |
Prefecture Semi-Postal – Japan |