National Benzole Mixture petroliana promotional lapel badge

A good original circa 1930's period 'National Benzole Mixture promotional lapel badge'; chromium plated example depicting the Mercury's head logo in black and gold enamel, the reverse with maker's details in relief 'Fattorini & Sons Ltd Bradford Works B'Ham.' Good condition, complete with original buttonhole fitting, graze to black enamel centre left. Diameter 24mm.