I have two challenge coins that were presented to me by those named on the coins:
First was presented by Master Chief Petty Officer (E-9) Vince Patton. Vince was at the time Command Enlisted Advisor of the Atlantic Command, United States Coast Guard. Vince's next and final assignment was Master Chief of the United States Coast Guard (MCPO-CG) . He retired in 2009. While in the USCG, Vince earned a
PhD at American University.
Next was Frank Welch of Houston, Texas. Frank served as Command Enlisted Advisor of the ninth district (Great Lakes). Next he was School Chief of the CPO Academy at Petaluma, CA. Then assigned as officer-in-charge of a cutter (ship) ported at Bodega Bay, CA. That was Then followed by a four-year assignment as Master Chief Petty Officer of the United States Coast Guard. (He succeeded Patton). The challenge coin reads, MCPO-CG on one side and the anchor with three stars is on the other. (One star is Senior chief; two stars is Master Chief; and three stars is MCPO-CG) . Welch retired in 2009 after 26 years in the USCG. I know him well and speak with him often.
Both coins are about the size of a silver dollar.
At Frank's retirement ceremony at D.C., I met the then Sgt. Major of the Army, Sgt. Major of the Marine Corps, MCPO-Navy and the Chief Master Sgt. of the AF. (Should asked for coins, but I didn't.)