IWC Portugieser Chronograph Ceratanium

The IWC Portugieser Chronograph Ceratanium is a current-production chronograph watch with a black ceratanium case. The caseback is open, so the movement is visible.

3 official photos · reader photos welcome

Ceramic

Ceratanium

Water resistance

30 m

Reference

IW371631

Type

Chronograph

Case diameter

41.0 mm

Thickness

13.1 mm

Lug-to-lug

47.9 mm

Origin

Switzerland

Movement

Automatic chronograph, column wheel

Caliber

IWC 69355

Power reserve

46 hours

Complications

Chronograph

Colour

Black

Construction

Monobloc

Caseback

Sapphire (tinted)

Nickel-free

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

Bracelet / strap

Integrated black textured rubber strap with a Ceratanium buckle

Crystal

Sapphire

Display back

Yes

Dial

Black

Dial colours

Black

Availability

Offered

Status

Current (limited edition of 1,500)

Not published

Price, Weight, Hardness, Surface treatment, Ceramic bracelet, Lume

Medium confidence Verified Jul 2026 Source: SJX / IWC product page

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