That's for diagnosing electronic problems with radars, military radios and so forth.
If you're looking for a very nice income-tax receipt, try contacting the Commonwealth Air Training Plan Museum in Brandon, Manitoba. Set a value on it and they will give you a tax receipt for what it's worth. They have a whole bunch of Wartime aircraft and other military radios, mostly came from my Dad's collection; this would be a fine addition to their radio display.
For those interested, they also happen to have an airworthy HARVARD (Canadian T-6 Texan for John Sukey!), a flying TIGER MOTH (DH-82) and a CORNELL. Static displays include Bristol BOLINGBROKES, Avro ANSONS, Cessna CRANES an actual Westland LYSANDER and a HURRICANE. They also have the ONLY serviceable Mark I Link Trainer (the very first instrument-flying fight simulator) in the world; that was the last job my Dad worked on.
Help them, help us all, help yourself, all at the same time!
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