1860:

Before the world was divided into time zones, there were hundreds of local times based on the longitude of regions and more or less recognised officially.

Watchmakers began making what were known as "captain's" watches; these indicated the local time of a traveller's point of departure on one dial and that of the place where the traveller was on a second. Other watches mentioned the local time of a whole number of towns as well as that of the place where one was staying.

GIRARD-PERREGAUX pocket watch, 1860