2346. World War 2 WWII -Vietnam Era US Navy Blue Wool Flat Hat With Band size 7 Navy Memorabilia. Part of an official United State Navy Uniform form the 1940s-1970s. Great condition but does have wear on the label. Please look at the pictures. Always consider offers. Original US Navy Sailors Flat Hat with US Navy Band. Produced from WW 2 to 1960's. Hat correct for WW 2 era to Vietnam. Blue/black wool, no holes. Size 7 This authentic U.S. Navy flat hat, commonly known as the ?Donald Duck? hat, was standard issue from World War II through the Vietnam War eras. Made from blue wool, it features a black band with ?U.S. NAVY? inscribed, a design introduced post-1941 for security purposes. The hat is in excellent condition with no significant wear or holes. Marked as size 7, it measures approximately 22 inches in circumference. This vintage hat is a valuable piece for collectors of military memorabilia, reflecting naval attire from both wars.