Description
Large 240-volt Mazda incandescent lamp bulb with copper alloy bayonet fitting. Has a thick spiral filament. "230-240 V / MAZDA / B.T.H PATENT 55 / MADE IN ENGLAND" printed on the fitting.
Acknowledgement: © History of Science Museum, University of Oxford, inv.82022
Large 240-volt Mazda incandescent lamp bulb with copper alloy bayonet fitting. Has a thick spiral filament. "230-240 V / MAZDA / B.T.H PATENT 55 / MADE IN ENGLAND" printed on the fitting.