Azure, a fess embattled to chief and wavy to base Argent surmounted in pale by a double-warded key erect reversed counterchanged Or and Gules.
That for the regiments and separate battalions of the Army Reserve: From a wreath Argent and Azure, the Lexington Minute Man Proper. The statue of the Minute Man, Captain John Parker (H.H. Kitson, sculptor), stands on the Common in Lexington, Massachusetts.
WE CARRY THE KEY.
The embattled fess represents the walls of Shuri Castle on Okinawa, the seat of the ancient capitol of the Ryukyu Islands. The lower wavy line stands for the waves of the Pacific Ocean. The key alludes to the action on Okinawa, the last battle of World War II in the Pacific, as the key which unlocked the inner ring of Japanese defenses. It is double-warded in reference to its double symbolism: the unit's Ryukyus service and its Quartermaster function. The red and white colors allude to Japan. The fess and key together stand for the battalion's World War II service in Ryukyus.
The crest is that of the U.S. Army Reserve.
An insignia featuring a representation of the geyser "Old Faithful" was authorized for the 243d Quartermaster Battalion (Service) on 21 August 1942. That design was cancelled and the current design authorized for the 243d Quartermaster Battalion on 25 February 1966. The coat of arms was cancelled on 29 April 1970. The insignia was reinstated and redesignated effective 16 September 1996 for the 243d Quartermaster Battalion.