This is an example of a uniform distingtive collar insignia from the 4th Composite Group. The unit was formed from 2nd, 3nd and 28th Aero Squadrons in 1919. In 1920s, the group was transferred from Mitchell Field, New York to the Philippines. The Air Corps disbanded the group as an organizational unit in November 1941 a few weeks prior to the outbreak of war in the Pacific on December 7, 1941.
This object is on display in Boeing Aviation Hangar at the Steven F. Udvar-Hazy Center in Chantilly, VA.