A replacement aluminium 'call exchange' label, designed for use with GPO 300 series telephones. The label is a faithful reproduction of the original GPO 252/Q label and is pre-drilled. Each label measures 500mm x 6mm x 0.5mm and is printed in black on aluminium with rounded corners. The fixing screws are not included. This label would typically be used on 326, 328, 330, 392 & 394 telephones.