The 125th
anniversary of the Universal Postal Union was commemorated in 1999. Many
countries issued stamps, in a number of cases in connection with the 22nd UPU
Congress held in Beijing, China.
Stamp catalogue
Liechtenstein 25 May 1999
Republic of Moldova 9 April 1999
Slovakia 12 March 1999
Slovakia 15 July 1999
Tunisia 9 October 1999