Apprenticed to Henry Child in 1656-57, William Knottesford was freed in 1663-1664. He took his son John as apprentice in 1680-81. He was an Assistant in the Clockmakers' Company from 1676, Warden from 1681 and Master in 1693. Loomes (The Early Clockmakers of Great Britain, NAG Press, 1981, p.345) describes him as only attending 'when forced to'. Knottesford died in 1698.
A Charles II olivewood turntable clock by Knottesford was sold Christie's London, Important Clocks, 7 December 2005, lot 83.