Introduction of two tier post
First and Second Class post
| Stock Code: | 52191 |
| Issue Date: | 16 Sep 1968 |
| Producer/Series: | Royal Mail/Post Office |
| Postmark: | Windsor, Coat of Arms, FDI Postmark |
| Availability: | In Stock |

| Stock Code: | 52191 |
| Issue Date: | 16 Sep 1968 |
| Producer/Series: | Royal Mail/Post Office |
| Postmark: | Windsor, Coat of Arms, FDI Postmark |
| Availability: | In Stock |