Bulgari Octo Finissimo Perpetual Calendar Tantalum
Every two years, the Only Watch, which is under the patronage of Prince Albert II of Monaco, invites luxury watchmakers to each create a unique timepiece to be auctioned off. Ninety-nine per cent of the proceeds will go towards funding research on Duchenne muscular dystrophy. A total of 54 watch brands including Chopard, Hublot, Bulgari, Chanel and Richard Mille are participating in this edition's auction, which will happen on Nov 6, 2021.

Scroll through the gallery for the highlights.

Related: 8 New Watches to Know For July 2021

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Photo 1 of 12 Jaquet Droz Grande Seconde Skelet-One Tourbillon with plique-à-jour enamel dial
Photo 2 of 12 Hublot Big Bang Tourbillon Only Watch in sapphire case with orange bezel
Photo 3 of 12 Urwerk UR-102 “Gaïa” in asphalt-coloured anodised aluminium case
Photo 4 of 12 Bell & Ross BR01 Cyber Skull Sapphire Only Watch with orange sapphire skull motif
Photo 5 of 12 F.P. Journe FFC Blue with automaton blue fingers to indicate the hours
Photo 6 of 12 Audemars Piguet Royal Oak “Jumbo” Extra-Thin Only Watch with a case in titanium mixed with palladium-based Bulk Metallic Glass
Photo 7 of 12 Bovet 1822 Miss Audrey Sweet Fairy Only Watch with a dial made of pure sugar and hand-painted fairy
Photo 8 of 12 Girard-Perregaux Casequette, a revival of a '70s watch in forged carbon and titanium
Photo 9 of 12 Speake-Marin One&Two Dual Time Only Watch The Sun in bright orange, a colour associated with life and energy
Photo 10 of 12 Breguet Type XX Only Watch 2021 is a faithful recreation of a 1950s pilot chronograph, from the 38.3mm case to the movement based on a Valjoux calibre used by Breguet at the time
Photo 11 of 12 Ulysse Nardin UFO Table Clock, a modern interpretation of marine chronometers
Photo 12 of 12 Bulgari Octo Finissimo Perpetual Calendar Tantalum