The Titanium Field Guide

Bianchet B1.618 Flying Tourbillon Sport GMT Hybrid

HBSBFTSG4 / HBRFTSG4

The Bianchet B1.618 Flying Tourbillon Sport GMT Hybrid is a 43 mm carbon watch with a hand-wound movement. With a 90-hour power reserve, only three of the 100 other mechanical carbon watches with a stated reserve run longer.

All Bianchet watchesOther watchesLightweightLightest, rankedTourbillonDisplay backGMT
Price
≈$90,709 (CHF 75,500)
Material
Carbon
Grade / type
Titanium-dust high-density carbon
Weight
62 g (head only)
Water resistance
100 m
Reference
HBSBFTSG4 / HBRFTSG4
Type
Other
Case diameter
43.0 mm
Thickness
14.35 mm
Lug-to-lug
51 mm
Origin
Switzerland
Movement
Manual-wind flying tourbillon (60-second) with GMT and day-night indicator, 3 Hz, 20 jewels
Caliber
Bianchet in-house flying tourbillon GMT
Power reserve
90 hours
Complications
Tourbillon, GMT
Colour
Black
Construction
Assembled
Finish technology
Natural finish
Caseback
Sapphire (display)
Nickel-free
Unconfirmed (clasp or buckle material not confirmed)
Bracelet / strap
Two natural vulcanized rubber straps with a Grade 5 titanium folding clasp
Crystal
Glare-proof sapphire, front and back
Display back
Yes
Dial
Openworked skeleton with sky blue or red accents
Dial colours
Blue
Lume
Super-LumiNova
Availability
Offered
Status
Current (10 percent deposit to reserve)
Not published
Hardness, Surface treatment, Matching bracelet
High confidence Verified Oct 2026 Source: Bianchet (Hybrid Sky Blue) / Bianchet (Hybrid Red)
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Alternatives to the Bianchet B1.618 Flying Tourbillon Sport GMT Hybrid

Richard MilleRM 62-01 Tourbillon Vibrating Alarm ACJ$1,552,86042.0 mm16.9 mm thickOthersame category · same style · shared complications · similar sizeAudemars Piguet Royal Oak Concept Flying Tourbillon GMT 26589IOAudemars PiguetRoyal Oak Concept Flying Tourbillon GMT 26589IO–44.0 mm16.1 mm thickOthersame category · same style · shared complications · similar sizeAudemars Piguet Royal Oak Concept Flying Tourbillon GMT 26589IO Grey CeramicAudemars PiguetRoyal Oak Concept Flying Tourbillon GMT 26589IO Grey Ceramic–44.0 mm16.1 mm thickOthersame category · same style · shared complications · similar size
Audemars PiguetRoyal Oak Concept Flying Tourbillon GMT 26589IO Black Ceramic–44.0 mm16.1 mm thickOthersame category · same style · shared complications · similar sizeAudemars Piguet Royal Oak Concept Flying Tourbillon GMT 26589IO BurgundyAudemars PiguetRoyal Oak Concept Flying Tourbillon GMT 26589IO Burgundy–44.0 mm16.1 mm thickOthersame category · same style · shared complications · similar sizeRessence Type 7RessenceType 7$53,75841.0 mm14 mm thick123 gOthersame category · same style · shared complications · similar price

More watches from Bianchet

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Frequently asked questions

What is the case of the Bianchet B1.618 Flying Tourbillon Sport GMT Hybrid made of?

The case is titanium-dust high-density carbon. That is confirmed against the maker's specification. The caseback is sapphire (display).

What size is the Bianchet B1.618 Flying Tourbillon Sport GMT Hybrid?

The case is 43 mm across, 14.35 mm thick and 51 mm from lug to lug. It is water resistant to 100 m.

How much does the Bianchet B1.618 Flying Tourbillon Sport GMT Hybrid weigh?

About 62 g for the watch head alone.

How much does the Bianchet B1.618 Flying Tourbillon Sport GMT Hybrid cost, and is it available?

It is in production, at a list price of $90,709.

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