This is a partly coded generic skin intended to be applied to AI wingmen when making up the flight numbers.
It carries the code of the 365th Fighter Squadron which was "CH". The sim will then apply the individual code letter/serial number from its default settings to the rear fuselage and tail.
This P-47D-28 was flown by Capt George Lamb of the 356th Fighter Squadron, 354th Fighter Group, 9th Air Force from November 1944 until early February 1945.