Here are a list of various sites that you may find of interest.
| Description | Link to site |
|---|---|
| List of British Postage Stamps – Wikipedia | https://en.wikipedia.org/wiki/List_of_British_postage_stamps |
| Postmark – Wikipedia | https://en.wikipedia.org/wiki/Postmark |
| Home – The Postal Museum | https://www.postalmuseum.org/ |
| Philatelic Web – Postmark Database | https://philatelicweb.com/pmks/ |
| Philatelic Federation of South Africa | https://stampssa.africa/ |
| Association of British Philatelic Societies | https://www.abps.org.uk/ |
| Civil Service Philatelic Society | https://cspsuk@wordpress.com |
| National Library of Scotland Map images | https://maps.nls.uk/ |
SEEOPS 