Polar bear - The Greenland Post Office
The Chilean Navy - Penguin
Geophysics - Penguin
Expedition - Penguin - Paquebot
Ice breaker - Helicopter - Polar bear
US Antarctic Research Expedition - Penguin
Polar bear
Scottish East Greenland Expedition
Bird - Penguin
Bird - Penguin - Furs
Opening of Wilkes Post Office
Byrd Antarctic Expedition - SS Jacob Rupert
Byrd Antarctic Expedition II
Alaska Dog Team Post - Kotzebue
Alaska Dog Team Post - Miller House
Alaska Dog Team Post - Hooper Bay
