WW2 Air Ministry RAF Spitfire MK XIC Oxygen Regulator 6D/1275

SPITFIRE Mk XIC OXYGEN REGULATOR Stamped with Air Ministry Crows foot. This rare combination Oxygen Content Gauge and Oxygen Flow Regulator Assembly, British Air Ministry Mark XIC, was installed in the later variants of the P.R Spitfires such as the Mk XIII and Mk XIX. The pressure gauge in the upper right displayed the contents in the oxygen tank. The oxygen system was opened and flow adjusted by rotating the knob in the lower right. The oxygen flow rate is indicated by the twin floating balls in the flow meter in the upper left, assuming that the flow was adequate when the copper balls were balanced between the two index markers on the left and right of the centre of the flow meter. At the bottom left is a switch to immediately raise the flow of oxygen to “High" from Normal in the event of a sudden need.