GMT Watches

Two mechanisms exist and the difference matters if you travel. A true GMT, sometimes called a flyer or caller depending on which hand jumps, lets you move the local hour hand in one-hour steps without stopping the watch, so you reset on landing in seconds. An office GMT moves the 24-hour hand instead, which is fine for tracking home from a desk but awkward on arrival. The specification rarely says which, and the price is a reasonable guide.

A rotating 24-hour bezel adds a third zone. Between GBP 110 and GBP 39,000 here, with the median around GBP 620, Seiko and Certina cover the practical end and Oris and Zenith the serious one.

GMT Watches holds 227 models across 53 brands, from £27 to £119,950. Half cost less than £919, and a quarter less than £197. 114 of 227 are automatic. 88 are stocked by more than one retailer, giving 338 offers in total. Longines lists more references here than any other brand. Prices are checked nightly against the retailers’ own feeds.