Big Bang Unico with a white case and a green skeleton dial and strap. This specific colour combination is likely the "Mint Green" or "Dark Green Ceramic" edition, depending on the exact shade of green.
Product Details
Brand: Hublot
Collection: Big Bang Unico
Case Material: Ceramic (white/green, depending on the specific model)
Dial: Green skeletonized dial, revealing the internal mechanism
Movement: Self-winding HUB1280 UNICO manufacture automatic chronograph calibre
Strap: Structured rubber strap, often featuring a deployant buckle