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JOHN DAVIS & SON LTD., Derby
An oxidised-brass air-flow meter, No. 2026, with eight-blade aluminium fan and silvered dial with three subsidiary dials, suspension loop, tripod bush and retailer's signature Davidson & Co. Ltd., Belfast -- 4in.(10cm.) diam., in aluminium case
An oxidised-brass air-flow meter, No. 2026, with eight-blade aluminium fan and silvered dial with three subsidiary dials, suspension loop, tripod bush and retailer's signature Davidson & Co. Ltd., Belfast -- 4in.(10cm.) diam., in aluminium case