US WW2 Signal Corps Oscillator V0-4 DiR-Fi

In a very nice condition a US WW2 Signal Corps Oscillator VO-4 DiR-Fidated 1943.
The Oscillator is not tested.
The US Army Signal Corps VO-4-C (and variants like D) was a portable oscillator used during World War II, produced around 1943 to generate audio or radio frequency signals for testing and calibration. It belongs to the "VO" designation category (Oscillator) within the Signal Corps nomenclature system, designed to produce precise, stable frequencies for field radio equipment.

Code: 85811