Silver sector made by Edmund Culpeper and signed 'Culpeper Fecit" between 1700-37, Moorfields, London.
Sectors are mathematical instruments that were used for calculations concerning proportion and for making small measurments. They were particularly useful for technical drawing. Edmund Culpeper (active 1684-1737) was a mathematical instrument maker, whose workshop the 'Old Mathematical Shop' was located at Moorfields in London. He was apprenticed to Walter Hayes in 1684, became a Freeman of the Grocers' Company in 1713 and took over Hayes' business at Moorfields.