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Perhaps the variable capacitors are adjustable from 8 to 40 pF but that's a long shot. The plug in coils either need to be reverse engineered as to turns and wire size etc. or measured. Or simply scrapped and the forms re-used.
Here is a situation where an impedance bridge would be very useful. Barring that, you can connect the variable capacitor to a coil and measure the resonant frequency.
No stock answers here, sorry.
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