Overall: 4 3/4 x 3 1/2 in. ( 12.1 x 8.9 cm )
affixed: center: "T/278"
Brass badge in shape of rayed star, with crown at top; tin number affixed to center, encircled by a roped border with an inscription inside it.
This badge was probably worn on the uniform cap of a London Metropolitan policeman.
Due to ongoing research, information about this object is subject to change.