It seems odd that the morse key originally had a red and black wire to hook it up when everything else used that drab greenish colour. Here's my key with those wires attached. They're about 2 feet long which is what they call for.
The wave meter had those two spare valves with it. The bigger one is the same as one in the set but the smaller one doesn't have a counterpart unless it's for the vibratory unit that I don't have. It fits in the spare valve case. I'm missing the lid too.
The correction chart has Oct 1, 1940 on one side and March 30, 1943 on the other side. Seeing as how the 11 set was the most modern unit this wave meter was used with, I guess the Brits were still using them for training in 1943.
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1940 Cab 11 C8 Wireless with 1A2 box & 11 set
1940 Cab 11 C8 cab and chassis
1940 Cab 11 C15 with 2A1 & Motley mount & Lewis gun
1940 Cab 11 F15A w/ Chev rear ends
1941 Cab 12 F15A
1942-44 Cab 13 F15A x 5
1942 cab 13 F15A with 2B1 box
1943 cab 13 F15A with 2H1 box
1943 Cab 13 C8A HUP
1944 Cab 13 C15A with 2C1 box
1943 Cletrac M2 High Speed Tractor
MkII Bren gun carrier chassis x 2
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