The father of Edward Lancalot Williams is listed as a Watchmaker, at his marriage in Farnworth on 12th July 1871.
John Williams was a Watchmaker but from Liverpool and working in Liverpool throughout his life.
Attending the wedding of Edward Lancelot to Martha Myatt in 1871, there is no indication that John had any residence in Farnworth, so he can be discounted as a Farnworth Clock Maker.