Robertsons 1980 Golly darts player advertising badge

A scarce original circa 1980's 'Robertson's marmalades and Jam Golly darts player promotional badge', the reverse with maker's details '©James Robertson & Sons P.M.Ltd'. Very good condition, complete with original pin fittings, safety roller catch in good working order, no damage to the painted enamel finish. Height approx 31mm.