I am also a descendant of one of the David Collier clockmakers ( there was more than one in fact)so may be able to help with some information. The clocks were mostly made in Cheadle and Gatley in the Greater Manchester area. Unfortunately there is a lot of wrong information about the family in clock books. I would be very interested to learn more about your clock and about the family ( surnames for example)especially if there is a family connection.
David Collier by: Peter
David Collier 11, Gatley, born 1740. He was the son of DAVID 1 of Etchells, the father of JOHN of Cheadle, the brother of SAMUEL of Eccles and Gatley, and the nephew of THOMAS of Eccles.
His son John, born 1762, also became a clockmaker and moved from Gatley to nearby Cheadle circa 1780. Aged 17, he married Alice Hampson at Eccles in 1799. His gravestone reads 'John Collier of Cheadle, clockmaker, died June 11th 1816, aged 54