Wireless for the Warrior Compendium 7 is a printed version of the PDF publication 'Key and Plug Assemblies An overview..'. This overview shows the currently known types and variations of British and Commonwealth Army Key and Plug Assemblies (versions with and without protective cover, and knee straps), spanning the period from the late 1930s until the early 1950s when the Larkspur range of equipment started coming into service.
The publication is a follow-up of 'Lamps Operator An overview..'. Both publications were compiled in close collaboration with Chris Bisaillion. Many of the Morse keys in this overview are from Chris' collection. See also www.wftw.nl