Working Instructions. Wireless Set. no.38, MK 2. WO 1069 - Engeland Voorschrift Signal Training. (All Arms) Pamphlet no. 5. Signal Procedure. Part 1. Procedure for Radio Telephony. 1943 - Engeland Voorschrift Working Instructions. Wireless Set no.38. Mark II and II*. WO 1071 - Engeland Voorschrift Working Instructions. Part I. Wireless Sets no.19. mark I, Mark II, and Mark III. WO 1055 - Engeland Voorschrift