2004 – 23rd UPU Congress, Bucharest, Set of 6. Designs: Stamps commemorating UPU Congresses: 8000 l, Romania #4619b. 10,000 l, Switzerland #590. 19,000 l, South Korea #1794 horiz. 31,000 l, People\’s Republic of China #2868. 47,000 l, United States #2434, horiz. 77,000 l, Brazil #1629.