The Will of Charles Chesterman, goldsmith late of St Andrew’s parish, Holborn, was granted probate on 22nd April 1775 (National Archives reference PROB11/1006/319).
His widow Ann (Grimwade p.464) entered her mark at Goldsmiths’ Hall on 20th April 1775.
Grimwade mentioned an obituary in The London Magazine announcing .....1770 Chesterman, goldsmith died 4th May. It appears to be premature as far as Charles was concerned.