This is a booklet was published by the RSGB in 1947, this electronic copy is of the third edition of 1948.
The booklet is an 18 page PDF file, 3.63MB in size, with 2 facing pages per PDF page. The cover has received a fair bit of damage but the internal pages are OK.
It lists equivalents for Navy, RAF, Army, "CV" (Common Valve), US Signals and Continental Valves
If you require Adobe Reader then that can be downloaded (free) from 
Here.
