677 - Return to sender from Qaanaaq, Greenland

583 - Return to sender from Thule Air Base, Greenland

539 - Return to sender from Pituffik, Greenland

530 - Return to sender from Ilulissat, Greenland

428 - Return to sender from Pituffik - Dundas, Greenland (thanks KKKhor!)

278 - Return to sender from Nuuk, Greenland (insufficient postal rate)

192 - Postcard from Thule, Greenland

133 - Postcard from Nuuk, Greenland

90 - Return to sender from Ammassalik,Greenland

52 - Cover from the AFCRL Geopole Observatory Thule Air Base Greenland