Through to 1970 : devised by the Royal Signals Institution to mark the Golden Jubilee of the Royal Corps of Signals and the Centenary of … Royal Signals Pocket Book. Part I. Graphical Symbols, WO 7552 - Engeland Voorschrift 26/GS Publications/1418 Royal Signal Pocket Book. Part II. Wireless Diagrams. WO 7553 - Engeland Voorschrift 26/GS Publications/1355 Royal Signals Pocket Book. Part V. Line Data. WO 755 - Engeland Voorschrift 26/GS Publications/1421 Training Memorandum. no. 4. Royal Signals. WO 7556 Training Memorandum. no. 6. Royal Signals. WO 7558 Training Memorandum. no. 7. Royal Signals. WO 7559 Training Memorandum. no. 8. Royal Signals. WO 7560 masters of the march Masters of the March - Volume 1 C.B. 1970 (39) Handbook for Asdic Sets, Type 128, 128S, & 128L. (1939)
