From The National Guard web site. The extract below was actually printed in their predecessor magazine National Guardsman.

April 1950. Air National Guard teams participated in the annual U.S. Air
Force Gunnery Meet for the first time, The Air Guard was authorized two
teams in the competition which was held at Las Vegas, Nevada. Utah’s 191st
Fighter Squadron, flying F-51s, finished fourth in the conventional aircraft
class. Florida’s 159th Fighter Squadron, operating F-80s, finished eighth in the
20 jet aircraft class.

My guess is these chips were made for poker games the Guardsmen played during the Gunnery Meet held by The Air Force in Las Vegas.