Issued in 1979, this Chilean stamp commemorates the 25th anniversary of the founding of Puerto Williams (1953–1978), the southernmost city in the world, located on Navarino Island in the Chilean Antarctic Province. The design presents a tranquil view of the Beagle Channel, framed by snow-capped mountains and a moored vessel, symbolizing Chile’s enduring maritime presence in the far south. The $3.50 denomination issue highlights national pride in the development of this remote settlement, first established as a naval base and later expanded into a civilian community.