 The original club crest was a crossed pair of rivet hammers ; tools commonly used in the iron and shipbuilding industry . A castle was later ( circa 1903 – 04 ) added to the crest and represents a prominent local building , Green Street House , which was known as " Boleyn Castle " through an association with Anne Boleyn . The manor was reportedly one of the sites at which Henry VIII courted his second queen , though in truth there is no factual evidence other than the tradition of rumour . 
