http://www.clockmakers.org/museum-and-library/museum/

The Museum is generally open from Monday to Saturday each week (except public holidays and the Saturdays before Bank Holiday Mondays)
from 9.30 am until 4.45 pm, though it may be closed (briefly) from time to time for re-winding and adjusting the clocks.

Guildhall Library
on 020 7332 1868 / 020 7332 1870

Email: guildhall.library@cityoflondon.gov.uk

City of London/ Guildhall Library, Aldermanbury, London EC2V 7HH.