Usage examples (6)

• In large towns, timekeepers would drop a "time-ball" at the top of a high tower.
• And the men of lower Broadway hurrying along the walks, conscious of time and money, stopping at noon to check the precision of their big watches with Western Union's red...
• Telegraph Hill and its semaphore and time-ball were features of business life.
• But despite this, every afternoon a member of staff from James Ritchie & Son clockmakers, in Broughton Street, has walked up the 170 steps to the top of the Nelson Monument,...