A Gold color metal and enamel device 1 1/4 inches (3.18 cm) in height overall consisting of a shield blazoned: Gules, a 155-mm gun with carriage Proper between three mullets Or. Above the shield from a wreath Or and Gules, a cockatrice Or, armed, jalloped and crested Gules. Attached below the shield a Red scroll inscribed "ALWAYS READY" in Gold letters.
The shield is red for Artillery. The gun represents the arm or weapon, and the three mullets are taken from the Philippine flag. The unit being allocated to the Philippine Islands, uses a cockatrice for a crest. Corregidor Island is symbolized by a fighting cock; the island is surrounded by the China Sea, and China is usually symbolized by a dragon; therefore, the cockatrice - half cock and half dragon - is symbolic of the location of the organization in the Philippines.
The distinctive unit insignia was approved on 10 December 1937. It was rescinded/cancelled on 14 March 1975.