Working Instructions. Telephone Set, L. WO 1530 - Engeland Voorschrift Signal Training. Pamphlet no. 8. Signal Office Organization and Procedure. Part II. Procedure for Telephone Switchboard Operating. 1945 - Engeland Voorschrift Working Instructions. Telephone Sets F. High Power no. 1, Mk. II. WO 1024 - Engeland Voorschrift Working Instructions. Part I and II. Apparatus Carrier Telephone (1en 4). MK II. WO 939 - Engeland Voorschrift Working Instructions. Telephone Set. J. WO 1554 - Engeland Voorschrift Working Instructions. Telephone Set D MK V. WO 1529 - Engeland Voorschrift Working Instructions. Telephone Sets F. MKS I, I* & II. WO 1527 - Engeland Voorschrift
