Add these state-of-the-art watches to your precious collectionBovet

The Amadeo Fleurier Virtuoso III features a five-day tourbillon with a retrograde perpetual calendar and reversed hand-fitting. The dial features aventurine or bits of meteorites. The watch demonstrates an unrivalled degree of expertise in fine watchmaking. Price on request

Bulgari

The dial of the 18ct pink gold Octo Finissimo Tourbillon Monete watch is covered with an ultra-rare 4th century Roman coin. The complexity of the watch’s mechanical system is revealed by pressing the crown, HK$2.84 million

Harry Winston

Apart from the multilayered open work on the dial, the Ocean Big Date Only Watch also features a sophisticated mechanical automatic movement with twin barrels and a flat silicon balance spring below deck. Price on request

Richard Mille

Designed for athletes such as Wayde van Niekerk, who is involved with high-intensity activities, the RM67-02 Sprint features an ultralight Quartz TPT and Carbon TPT case that offers shock resistance, and has a highly elastic strap. Price on request

Roger Dubuis

Inspired by the specific colour coding of supercar dashboards, the Excalibur Spider Double Flying Tourbillon is adorned with supercar features, including a speedometer-type small seconds display, and a power-reserve indicator resembling a racing car cockpit fuel gauge. The stitching on the strap takes inspiration from supercar seats, HK$2,070,000

Vacheron Constantin

With an integrated 514-part calibre measuring a mere 8.7 mm thick, the twin-dial celestial white gold Celestia Astronomical Grand Complication 3600 features 23 horological complications, a combined display of civil, solar and sidereal times, and a tourbillon with a three-week power reserve. Price on request