Royal College of Nursing RCN union membership badge

A good original post 1953 nurses union badge; chromium plated rectangle shaped example with sunray border 'RCN' initials to the centre on blue enamel background, the reverse impressed with unusual maker's details 'AEW B'Ham' possibly (Arnold E Williams, Birmingham). Very good condition, complete with original pin fittings, enamel perfect. Size 26 x 17mm.