John Walker is a family business established in 1830 that specialises in restoring and repairing both modern and antiquarian timepieces. John Walker were manufactures of clocks and are best known for supplying timepieces to the principal railway companies of the day. They supplied them with clocks and watches and also to maintain and service them. John Walker started in business in 1845 and the company were still in existence as late as 1980. Their main location was 1 South Molton Street but they had various premises in London: addresses’s can be found on the dials of their clocks.