Scale: Unknown. A model of Martin's patent self canting anchor (1869). The model has been cast entirely from brass with a lacquered finish and illustrates the working parts of this type of anchor with swivelling flukes and shackles. At the crown, the flukes pass through as a single piece on the arms and are held in position by a large steel pin. At the very top of the crown a brass D-shackle is fitted, again secured with a brass pin. The shank is rectangular in section and tapers towards the top passing through the flat, shallow V-shaped stock which is held in place with a fidded steel wedge. Above this is fitted a brass bow shackle, held in place by a brass bolt. At the extreme end of the flat stock two holes have been drilled which were probably used for stowing and handling the anchor.