This is a US military-issue M-1951 Pile Field Cap. Manufactured on May 21, 1952, by Atlantic Highlands MFG. CO. This is an early production run, and a rare piece with both original labels intact. This cap is part of the M-51 series of equipment issued during the Korean War for cold weather conditions. The lining uses a boa material made of alpaca blend. The ear flaps can be secured up or down, and the design allows for use with a helmet. 【Specs】 ・Outer: Cotton (Olive Drab) ・Lining: Wool 80% / Cotton 20% ・Pile (Ear Flaps): Alpaca 60% / Cotton 40% ・Manufacturer: Atlantic Highlands MFG. CO. ・Date of Manufacture: May 21, 1952 ・Size: 7 1/4 (approx. 58cm) ・MADE IN U.S.A. (US Military Issue) 【Condition】 ・Overall in good condition ・Some signs of wear (see photos) ・Considered to be in good condition for its age ・Both labels are clearly present, and the size is legible. 【Notes】 ・Dry cleaning recommended (as indicated on the label) ・Please purchase only if you understand vintage/military surplus items Thank you.