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01: Vacheron Constantin Les Cabinotiers Celestia Astronomical Grand Complication 3600

[dropcap size=small]N[/dropcap]ot content with creating the world’s most complicated ticker, the Ref. 57260 pocket watch, two years ago, Vacheron Constantin is coming back guns blazing in 2017 with the Les Cabinotiers Celestia Astronomical Grand Complication – its most complicated wristwatch. As its name suggests, the unique piece is packed with astronomical goodies, with the more unusual ones being running equation of time, length of day and night, solstices, equinoxes and zodiac signs, just to name a few.

02: IWC Perpetual Calendar Chronograph

IWC’s Da Vinci collection has never been one to shy away from change, even if it’s a familiar one. Going back to its 1985 origins, the once-tonneau case is reverting to its round shape and our pick, the IWC Perpetual Calendar Chronograph, gets a brand new in-house movement as well. It has a highly precise moon phase and a totaliser (a new combination for IWC) as well as a flyback chronograph.

03: Audemars Piguet Royal Oak Perpetual Calendar in black ceramic

Even without the perpetual calendar, this Audemars Piguet novelty would win fans from sheer handsomeness alone. The Royal Oak Perpetual Calendar in black ceramic is the first from the brand to feature a case and bracelet in ceramic, complete with exceptional satin brushed and polished finishes — a process that takes five times longer than a steel model.

04: TimeWalker Chronograph Rally Timer Counter

Part of Montblanc’s revamped TimeWalker collection this year is the TimeWalker Chronograph Rally Timer Counter, which uses the in-house Minerva calibre MB M16.29 — a monopusher chronograph with column-wheel and horizontal coupling. Its hefty 50mm size also allows it function as a table clock, stop watch or dashboard-mounted clock.

(RELATED: Catch up in case you missed Day 1Day 2 and Day 4 highlights.)