| Subject | Description |
|---|---|
| Subject | Description |
| Cachets | |
| Stamp colors | |
| APS/APRL | |
| Labels | |
| Perforations | |
| Marginal Markings | |
| Stamp Identification | |
| Revenues | |
| Precancels | |
| Universal Postal Union | |
| United Nations | |
| Subject | Description |
|---|---|
| Subject | Description |
| Cachets | |
| Stamp colors | |
| APS/APRL | |
| Labels | |
| Perforations | |
| Marginal Markings | |
| Stamp Identification | |
| Revenues | |
| Precancels | |
| Universal Postal Union | |
| United Nations | |