The World Time watch is one of the most useful complications for travelers; but though it’s been around since the 1930s, watchmakers have constantly been working ever since to make it more convenient and easy to use. There have been a bevy of new world time watches in recent months, and one of the most distinguished is from one of the oldest fine watchmaking houses: Breguet, whose founder invented (among other things) the tourbillon, in 1801.

For hundreds of years watches were made with just three materials: brass, steel, and ruby bearings. Patek Philippe is often considered the guardian of watchmakng’s most elegantly conservative high craftsmanship (with prices that match its peerless quality). But with its new limited-edition 5550P perpetual calendar, it’s taken a bold leap into a high tech future.