This is the squadron patch for the 58th Fighter Squadron that flew the F-4 Phantom in Vietnam, then transitioned to the F-15A Eagle in 1978 and flew that aircraft in Operation Desert Storm, then have recently transitioned to the F-35 and currently are organized under Air Education and Training Command’s 19th Air Force, at Eglin Air Force Base, Florida. Its mission is to train US Air Force operators and maintainers on employment and maintenance of the F-35 Lightning II “A” model, as part of the overall 33d FW mission of training American and international aircrews and maintainers of US Air Force, Us Navy, US Marine Corps, and international Air Forces. This patch has a really “OLD” feel to it and is the dark blue version, thus dating it back to the 70’s/80’s timeframe (in my opinion). Only have a few of these, and they do not have velcro.