Marine Fighter Attack Squadron 311 VMA-311 Challenge Coin

This coin is 1 5/8 inches in diameter.  Circa 1990s

Marine Fighter Attack Squadron 311 (VMFA-311) is a United States Marine Corps fighter attack squadron consisting of F-35C Lightning II. Known as the "Tomcats", the squadron is based at Marine Corps Air Station Miramar, California and falls under the command of Marine Aircraft Group 11 (MAG-11) and the 3rd Marine Aircraft Wing (3rd MAW).

(REF: Wikipedia)