| Accession of States of Johore, Kedah, Perlis, Kelantan and Trengganu to Extradition Treaty between the United Kingdom and Siam of March 4, 1911 |
Accession
|
28 October 1916 |
|
| Universal Postal Convention (Revision of Convention of May 26, 1906) |
Extension
|
1 December 1921 |
|
| Convention and Protocol revising Universal Postal Convention of November 30, 1920 |
Extension
|
3 October 1925 |
|
| Postal Union Agreement regarding Insured Letters and Boxes |
Extension
|
20 July 1931 |
|
| Treaty between the United Kingdom and Finland for the Extradition of Criminals |
Extension
|
19 October 1934 |
|