General Postal Union.

• Declaration recording the adhesion of British India to the General Postal Union of October 9, 1874, signed at Berne, July 1, 1876
• Declaration recording the adhesion of Ceylon, the Straits Settlements, Labuan, Trinidad, BritishGuiana, Bermuda, Jamaica, Mauritius and its dependencies and Hong Kong to the General Postal Union of October 9, 1874, signed at Berne, February 23, 1877