His Masters Voice HMV Accredited Dealer salesman's badge

A rare original circa 1940's vintage record company 'His Master's Voice Accredited Dealer salesman' advertising pin badge'; large silver plated disc inlaid with red and blue enamelling, depicting 'H.M.V.' trademark logo 'Nipper' the fox terrier dog, listening to a Gramophone. Good condition, complete with original pin fitting, minor stress lines to top section of the enamel and dark underglaze marks below.Diameter approx 25mm.