Dimensions:W: 3.5cm (1.4")H: 3cm (1.2")L: 11.5cm (4.5")
Stores reference 10A/13163. Impedance control box of the type fitted on flying helmet wiring looms and often seen in wartime photographs. Rotary switch to centre. Well marked with Air Ministry King's crown and reference numbers etc. Very good used condition. Stock code H23411.
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