|Universal Postage Union Centenary 1974|
The four stamps issued on 12 June 1974 show methods of transport which have played a part in overseas mail in the hundred years, 1874 - 1974.
- 3.1/2p - The P&O packet steamer of 1888
- 5.1/2p - The first official air mail flight from London to Paris at the time of the Coronation of George V in 1911.
- 8p - An Imperial Airways flying boat of 1937 which was later used on the England-Australia service.
- 10p -The blue air mail van and posting box first seen in London in 1930.