Robertsons 1970s Golly tennis player advertising badge Gomm

A good original circa 1970's period 'Robertson's marmalades and Jam Golly tennis player promotional badge', the reverse impressed with maker's details 'R.E.V.Gomm Frederick St B'ham.1'. Very good condition, complete with original pin fittings, no stress marks or damage to the enamel, gilt finish remains bright. Height 33mm.