Hublot Big Bang Unico Petrol Blue Ceramic 42mm

The Hublot Big Bang Unico Petrol Blue Ceramic 42mm is a current-production chronograph watch with a polished ceramic case. The caseback is open, so the movement is visible.

4 official photos · reader photos welcome

Material

Ceramic

Grade / type

Polished ceramic

Water resistance

100 m

Reference

441.ES.5121.RX

Type

Chronograph

Case diameter

42.0 mm

Origin

Switzerland

Movement

Automatic chronograph

Caliber

HUB1280 Unico

Power reserve

~72 h

Complications

Date

Colour

Blue

Construction

Assembled

Caseback

Sapphire

Nickel-free

Not verified (bracelet, strap, or clasp hardware not confirmed)

Bracelet / strap

Petrol blue lined rubber straps

Crystal

Sapphire

Display back

Yes

Dial

Petrol blue skeleton

Dial colours

Blue

Availability

Offered

Status

Current

Not published

Price, Thickness, Lug-to-lug, Weight, Hardness, Surface treatment, Matching bracelet, Lume

Medium confidence Verified Jul 2026 Source: Hublot Big Bang Unico Petrol Blue Ceramic 42 (maker)

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