Although found with the more complete helmet (ACG 01), the decoration of the cheek plate, shown with the latter in the museum display, more closely resembles that on the surviving brow-band shown here. It may be that the cheek plate used with ACG 01, therefore, has been misidentified.
References:
Robinson, H.R. (1975), "The Armour of Imperial Rome", (Arms & Armour Press), p.99, No.272
