A gold color metal and enamel device 1 1/8 inches (2.86 cm) in height consisting of a white triangular shaped rock bearing a gold five-pointed star in each corner superimposed on three blue wavy concave bars, between, at the top a gold mound with six gold trees in green foliage and, in base, a green scroll bearing the inscription "TAILORED FOR VICTORY" in gold.
Yellow is the Armor color. The organization's service as Coast Artillery is alluded to by the mound and water. Participation in World War I campaigns in France is represented by the wavy blue lines and trees for Meuse-Argonne and the white rock from the arms of St. Mihiel. The mound and water also symbolize World War II campaigns in the Pacific. The triangular rock with gold stars simulates the triangle on the Philippine Presidential seal and denotes the citation awarded the unit. Also, the trees, suggested by the tree on the arms of San Diego, with the water, designate the unit's home site.
The distinctive unit insignia was approved on 17 September 1970. It was amended to revise the description and symbolism on 4 August 1971.