Here is a pretty cool hat I found a couple weeks ago at a gun show. It's theater made in Japan for the USAF's 2703rd EOD 3rd Detachment Squadron. They were activated in 1958 to remove unexploded ordnance. From what I researched, each Detachment, there were 6, was authorized one officer, 15 airmen and one civilian. Probably not too many of these around!