I worked for W&G Instruments in Plymouth UK as part of my electronics course at Plymouth Polytechnic back around 1984. I built a test rig for one of the digital boards in the SPM-30 level measurement set. I still have a few bits of stuff I picked up from a clearance auction when I was there, actually my workbench is a canteen table from their old factory. Alas the site has been closed for a long time now.
The CRT in the distortion meter is probably a 1DP1 or something very similar. Cossor, the British company which developed the first all-electronic oscilloscope, made enormous numbers of those CRTs for miniature X-Y display modules back in the 1940s-50s. These were often used as waveform monitors in military radio sets.
Acterna Germany. When Wavetek was divested their communications division became Acterna. They made some excellent portable test sets for testing broadcast and CATV equipment. The company is now part of JDSU.
