An American 19th century R. Murphy open frame fly nut corkscrew,
An American 19th century R. Murphy open frame fly nut corkscrew,

細節
An American 19th century R. Murphy open frame fly nut corkscrew,
marked R. Murphy, Boston, traces of plating, centre worm; a French-type fly nut corkscrew (traces of plating) with Greek key pattern collar, marked Christofle (some corrosion and with indistinct marking), and with trade mark; and a small brass and steel Challenge-type corkscrew, centre worm.
See Plate 6 (3)