Product Overview
The upgraded Hublot Big Bang 421 (A42 Version) by LS Factory — a breakthrough sports chronograph built for bold, rugged style. Lightweight 44 mm case, skeleton open‑worked dial and iconic Big Bang design, available in multiple eye‑catching finishes.
Case & Construction
• Case diameter: 44mm, ergonomic build, lightweight and comfortable for all‑day wear
• Premium high‑performance case finishes: black ceramic, brushed steel, matte blue, military green, khaki and two‑tone variants
• Scratch‑resistant sapphire crystal
• Signature exposed‑screw bezel, faithfully reproduced original Big Bang silhouette
Dial
• Open‑work skeleton dial with visible mechanical details
• Clear printed chronograph scales, "FLYBACK" marking and distinctive oversized numerals
• Color‑matched hands and sub‑dial accents for each case variant
Movement
• Custom HUB 1280 automatic chronograph movement
• Reliable automatic winding, full chronograph functions, smooth operation
Strap
• Woven texture rubber strap with one‑click quick release
• Easy strap swap; robust, sporty and comfortable on the wrist
