Hublot Big Bang Unico Water Blue Sapphire Ref. 421.JL.4890.RT

Product Introduction

The Hublot Big Bang Unico Water Blue Sapphire Ref. 421.JL.4890.RT embodies a high-end futuristic sporty style. Distinguished by its strong open-worked skeleton design combined with a transparent water blue sapphire case, it creates a unique visual effect. Paired with a synchronized transparent rubber strap, this timepiece offers a modern, youthful feel while maintaining the brand’s technical identity, suitable for those who love distinctiveness, technology, and a pioneering spirit.

Story Behind the Watch

Inspired by the renowned Art of Fusion philosophy, Hublot created the Big Bang as an icon of breaking traditional boundaries since 2005, and the Water Blue Sapphire Ref. 421.JL.4890.RT continues that legacy. By utilizing transparent blue sapphire—a material considered extremely difficult to machine in the watchmaking industry—combined with an exposed chronograph skeleton face, this model honors the complete beauty of the internal movement. It represents a stride in materials and design for Hublot in the modern era, serving as a manifesto of personality, freedom, and relentless innovation.

Design Style

This model showcases a modern and fresh aesthetic. The high-quality transparent light blue rubber strap is soft and flexible, seamlessly integrating with the case. The fixed round bezel made of transparent blue material features signature technical screws, framing the intricate dial. The multi-layer skeleton chronograph dial in a grey and light blue tone reveals the mechanical structure, complemented by baton hands and Arabic numerals with luminous coating for readability and style.

Technical Specifications

• Case Material: 904L Stainless Steel
• Strap Material: High-quality transparent light blue rubber strap, metal buckle
• Crystal: Scratch-resistant Sapphire Crystal
• Hands and Hour Markers: Baton hands combined with Arabic numerals, luminous coated
• Bezel: Fixed round bezel in transparent blue material with technical screws
• Case Diameter: 44mm
• Dial Color: Multi-layer skeleton chronograph, grey – light blue tone
• Thickness: 13mm
• Movement: Japanese Miyota Movement, Accurate to ±10-12s/day
• Power Reserve: 18-24 hours
• Water Resistance: 10ATM (100 meters)

Collection

Big Bang Unico

Warranty & After-Sales Policy

• 30-day warranty from the date of receipt
• Resend support if manufacturing defects occur
• Refund guaranteed if the wrong model is delivered