An incomplete Colchester two-piece bow brooch of the early Roman period.
It is of the type that has a double-pierced lug for the spring mechanism, the lower perforation to hold the axis bar of the spring, and the upper one to secure its chord. The spring mechanism and a fragment of the pin survive. Only one wing survives, it is semi-cylindrical and undecorated. The oval-section bow tapers slightly to a blunt foot, and has decoration consisting of a longitudinal median groove with punched transverse grooves on either side, running from the head to the mid-bow and a single transverse groove at the foot. The back of the brooch has a triangular openwork catchplate.