The Aircraft Warning Service (AWS) was a civilian service of the United States Army Ground Observer Corps instated during World War II to keep watch for enemy planes entering American airspace.
These civilian observers received extensive training to become quite skilled in the recognition of aircraft. This training was so productive it became quite popular with even non-AWS citizens. Aircraft recognition became a popular hobby providing the country hours of entertainment and resulted in many books and publications, including aircraft recognition flash cards, on the subject. Many groups held contests and recognition "Bees". Spotting clubs and meetings became frequent events and became a popular activity during the period.
This armband appears to be unissued and remains in excellent condition. All colors are still quite vivid and the machine embroidery is still tight and very detailed. The deep blue wool felt backing has a few small moth nips and trails, but mostly on the edges that would be folded behind the armband. Dimensions 17"L x 4"W.
An interesting piece of history from a civil organization supporting the U.S. Army Air Corps.