Hublot Square Bang Unico Black Magic 42mm

The Hublot Square Bang Unico Black Magic 42mm is a current-production chronograph watch with a black microblasted and polished ceramic case. The caseback is open, so the movement is visible.

4 official photos · reader photos welcome

Ceramic

Microblasted and polished ceramic

Water resistance

100 m

Reference

821.CI.0170.RX

Type

Chronograph

Case diameter

42.0 mm

Origin

Switzerland

Movement

Automatic chronograph

Caliber

HUB1280 Unico

Power reserve

~72 h

Complications

Date

Colour

Black

Construction

Assembled

Caseback

Sapphire

Nickel-free

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

Bracelet / strap

Black structured rubber straps

Crystal

Sapphire

Display back

Yes

Dial

Black (skeletonised sapphire dial)

Dial colours

Black

Availability

Offered

Status

Current

Not published

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

Medium confidence Verified Jul 2026 Source: Hublot Square Bang Unico Black Magic 42 (maker)

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