This is a wing that is extremely rare in real life, a World War I Naval Aviation Observer Wing as shown on Page 16 of United States Navy Wings of Gold. This reproduction is sterling silver with a 24 karat gold plate. The original was hallmarked Amico and so is this one. 

The wings shown here are based on the 1917 design by NS Meyer for a Reserve or Junior Pilot. This was not a pilot held in Reserve, but one who came from the reserves and the junior pilot was new to the service. In Europe a 1/2 wing was awarded to someone who was carried on an aircraft and was not a pilot. The US 1/2 wings did not last long as the pilots were made fun off by their English and French counterparts. Making these 1/2 wings rather rare. They are one of the few 1/2 wings used in the US Military.

The wings that are shown are a museum quality reproduction of Balloon Aeronaut Pilot Wings. The original designer is not known, but the wings came from a collection in Paris and may have been designed and made in that City  This museum quality reproduction is made of Sterling Silver with the letters US gold plated. The silver parts are mounted on a plate which is covered by the wool cloth. These wings were authorized on 29 December 1917.

The Boeing KC-135 Stratotanker is an aerial refueling military aircraft. It and the Boeing 707 airliner were developed from the Boeing 367-80 prototype. The KC-135 was the US Air Force's first jet-powered refueling tanker and replaced the KC-97 Stratotanker. The Stratotanker was initially tasked to refuel strategic bombers, but was used extensively in the Vietnam War and later conflicts such as Desert Storm to extend the range and endurance of Air Force, Navy and Marine tactical fighters and bombers.