Arm of Service Strips began to be worn in 1941. By 1944 Every unit had a designation. Initially worn on their own, to denote the type of unit but to maintain security, they were later worn by every unit, each with their own colours. Infantry Brigades used tham also as a Brigade indicator, the number of Scarlet strips (up to three) denoting the Brigade within a division.
These reproductions are completely accurate. Two types are found, embroidered or sewn on felt. The latter were far more common, fully embroidered seem to have been found more often after the war.