The South African National Antarctic Expedition (SANAE) operates a base on the Antarctic Peninsula, currently SANAE IV. Summer population can reach 100 and the overwinter staff numbers about 10. The program is serviced by the S.A. Agulhas. Even though this cover was brought down to SANAE by Agulhas and the cancel says "Antarctica - Waterfront", I'm quite certain it was really cancelled in Cape Town. Agulhas is scheduled for retirement in the Spring of 2012.