Unworn Hublot Big Bang Unico Water Blue Sapphire 44, 421.JL.4890.RT, box and papers

The Hublot Big Bang Unico Water Blue Sapphire 44 mm is a stunning example of innovation and artistry, showcasing the brand’s mastery in sculpting sapphire crystal into a bold and futuristic timepiece. The transparent blue case is crafted entirely from polished water blue sapphire, offering both durability and a uniquely luminous aesthetic. Through the openworked dial, you can admire the in-house HUB1280 Unico movement—an automatic flyback chronograph with column wheel and a 72-hour power reserve. This watch pairs cutting-edge horology with modern sculpture, all completed with a matching transparent blue structured rubber strap for a sleek, high-tech look.

Technical Data
• Movement
– Caliber: HUB1280 Unico
– Type: Self-winding chronograph flyback movement
– Functions: Hours, minutes, small seconds, chronograph, date
– Power reserve: Approx. 72 hours
– Frequency: 28,800 vph (4 Hz)

Case
– Material: Polished water blue sapphire crystal
– Bezel: Polished water blue sapphire with titanium screws
– Crystal: Sapphire with anti-reflective treatment
– Caseback: Sapphire exhibition
– Water resistance: 50 m

Dimensions
– Diameter: 44 mm
– Thickness: Approx. 14.5 mm

Strap
– Type: Integrated strap
– Material: Transparent water blue structured rubber
– Buckle: Titanium deployant clasp