The Wristwatch Field Guide

Bianchet B1.618 UltraFino Carbon

The Bianchet B1.618 UltraFino Carbon is a current-production watch with a monobloc high-density carbon case. At 52 g it sits among the lighter watches in the guide, and is priced well above the $2,150 median across the guide. The caseback is open, so the movement is visible.

Exotic-material other watchesBlackDisplay back
Price
$73,000
Material
Carbon
Grade / type
Monobloc high-density carbon
Weight
52 g (with strap)
Water resistance
50 m
Type
Other
Case diameter
40.0 mm
Thickness
8.9 mm
Lug-to-lug
47.39 mm
Origin
Switzerland
Movement
Ultra-thin automatic flying tourbillon
Caliber
UT01
Complications
Tourbillon
Colour
Black
Construction
Monobloc
Caseback
Sapphire
Nickel-free
Not verified (bracelet, strap, or clasp hardware not confirmed)
Bracelet / strap
Vulcanized rubber; carbon bracelet optional
Matching bracelet
Optional (or strap)
Crystal
Sapphire
Display back
Yes
Dial
Openworked
Availability
Offered
Status
Current
Not published
Reference, Power reserve, Hardness, Surface treatment, Lume
Medium confidence Verified Jul 2026 Source: Bianchet (maker) / Monochrome Maker / listing ↗
Facts are free to cite with a link.
See it in the interactive guide

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Frequently asked questions

What is the case material of the Bianchet B1.618 UltraFino Carbon?

The Bianchet B1.618 UltraFino Carbon has a monobloc high-density carbon case with a sapphire caseback. It is recorded at medium confidence pending a maker-stated material.

What size is the Bianchet B1.618 UltraFino Carbon?

It is 40.0 mm in diameter, 8.9 mm thick, 47.39 mm lug to lug, and water resistant to 50 m.

How much does the Bianchet B1.618 UltraFino Carbon weigh?

About 52 g (w/ strap).

How much does the Bianchet B1.618 UltraFino Carbon cost, and is it available?

It is current-production and lists from $73,000.

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