mostly 1940s/60s, approaching two hundred covers and cards from Artic and Antarctic missions and scientific explorations, noting Operation Deep Freeze, Operation Deep Freeze II, Operation Highjump, U.S. Army Research teams, Naval Artic operations, 1950s Antarctic Expeditions, wide range of ship markings, as well as a variety of exploration and naval cachets, several signed covers, the odd fault but a chiefly attractive and fresh collection