Hi,
The case bear the Hallmark of London, the letter "s" is for the year 1912/13 ( The change of the letter happen on the 5th of March)
From "THE WATCHCASE MAKERS OF ENGLAND" by Philip Priestley
No trace of the case maker "C&Cdd".
Sir John Bennett Limited 'Founded in the Reign of George II,' one of the leading London retailers in the second half of the 19th century, Bennett himself being one of London's most colourful characters. (www.antiquewatchsrore.com)
Sir John Bennett (1814-1897)
Biography of clockmaker and watchmaker Sir John Bennett (1814-1897)
Sir John Bennett (1814-1897) FRAS was an eminent clockmaker and watchmaker. He was born on 15th October 1814 at Greenwich as a son of the watchmaker John Bennett.
Bennett is recorded as working at 65 Cheapside in London from 1847 onwards until at least 1883. He was sheriff of London and Middlesex in 1872 and was knighted to become Sir John Bennett. He also followed a career as a politician in London.
Bennett died at St Leonards-on-Sea on 3rd July 1897. (From Barnes Hampton & Littlewood)
The firm carried on till early 1930.
Tonywatch1748