Original boxes for 'Receiver Telephone, Head, Type C, 10A/8543', 1750 ohm receivers as used in the Type B flying helmets. Each would have contained one receiver. These are well marked and have additional faded labels on the side for later war issue Type 16 receivers. They show wear and use but are in fairly good used condition. Empty. Great for display. Priced individually. Will be posted unfolded/flat to reduce postal costs. Stock code Box1.