National Guild of Telephonists NGT union pin badge 1928 to 1970

A good original circa 1930's period 'National Guild of Telephonists union small gilt and enamel badge' bearing a black and white image of a communication domed tower, telegraph lines and inscribed DAY & NIGHT'; the reverse impressed with maker's details details 'Miller 118 Branston St B'Ham' (an address format used between circa 1931 to 1934). Very good condition, complete with original pin fittings, no damage to the enamel, gilt finish remains bright.