It has been suggested the logo I.F. at the tip of the handle relates to that of John Fathers.
COMPARATIVE LITERATURE:
J. Seymour Lindsay, Iron and Brass Implements of the English House, Tiranti, London 1970. An example illustrated fig.117.
Rupert Gentle and Rachel Field, Domestic Metalwork 1640-1820, Antique Collectors' Club, Woodbridge 1994. Page 245, pl. 4.