Identical content to New Cat. No. 1206, but complete with buff coloured covers with Index on inside front cover and details of Home and Overseas Agents on inside rear cover.
Also with addition of pp. 17-20 which includes a diagram of the oiling points for a Waiting Train Movement and diagrams of the following;
1. Circuit, Simple N.S.46
2. Circuit, Simple, incorporating Programme Instrument and Signal Duration Controller, N.S.47
3. Circuit Multiple, incorporating Sub-Transmitting Relays, N.S.48
4. Tower Clock, Typical Waiting Train installation, N.S.70