TIf you need a spare radio officers bible, Abe books usually has one or two orr three for sale. Different editions come up all the time.
This one I have just looked at is 1961 edition when it was PMG running the show and label is below.
Photo of it and details if you click on label below.
General with the Q codes Post Office Handbook for Radio Operators: Working Installations Licensed By Her Majesty"s Postmaster General Rg.67
https://www.amazon.co.uk/General-Off.../dp/B0041UH7WY
for+radio+operators+&kn=&
Editing.
Just reslized I gave you Amazon label not Abe books .
Here is an Abe books label with 2 for sale.
A 1978 edition and followed a few books down 1971 edition
handbook for radio operators - AbeBooks
https://www.abebooks.co.uk/servlet/S...ors+&kn=&isbn=
I
f you scroll down from the 1978 edition a few books later is an orange 1971 edition.
(That was the edition I had at start of the 3 year MRRT course I started early 70s (first intake year of new 3 year course which coupled MRGC with C and G finals. Some colleges still ran MPT course or both alongside eg Brunnel)