Air Ministry Variable Resistor, 5U/4792

On ebay a vendor has a trimmer resistor which due to its shape, could be ideal for an electrical project I have in mind.
It is similar to the Rotax ZA.26XX series of trimmer resistors which are rated at 8W.
Problem is, I have been unable to locate any information on this Sec/Ref number.

Could someone with section 5U (it may have changed to 5UC) from AP1086, look the reference number up and advise what its resistance and power ratings are.

Hey aircraftclocks,

I checked the AP1086. Stores Reference Number 4792 is for a variable capacitor of the butterfly type with a variability of 100 + 100 pfd (whatever that means, maybe phase frequency detector for tuning purposes?), not a variable trimmer resistor (unless that is another name for it??). It does not give any other specs. If I am reading the document correctly, it was used with the Type 2524 radio set. If you can find data on the Type 2524 radio set (built by Philips in the late-1920s and early-1930s) maybe that could give you the specs you need?