Great Britain year 1964 stamps – International Geographical Congress London MNH

The 20th International Geographical Congress, London, was a significant event in 1964 that was commemorated by a set of stamps issued by Great Britain. Here are some key details about these stamps:

1. Issue Details:
   • The stamps were issued in 1964 to commemorate the 20th International Geographical Congress held in London.
   • The stamps featured a design with flats near Richmond Park, highlighting urban development.
2. Stamp Specifications:
   • The stamps were of the denomination 2½d (2.5 pence).
   • The quantity issued was 109,768,120.
3. Varieties and Errors:
   • There were phosphor varieties of these stamps, which are considered fine mint.
   • A rare error variety exists where the 4d International Geographical Congress stamp is missing red-brown and violet ink, making it scarce and valuable.

These stamps are a notable part of Great Britain’s philatelic history, offering collectors a unique opportunity to own a piece of this significant event.