FB 1.3-1 Sapphire blue

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FB 1.3-1 Sapphire blue

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Totally unique in contemporary watchmaking

Issued in an exclusive five-piece limited edition, the model FB 1.3-1 combines platinum, grey ceramic, and a translucent blue dial decorated with fine lines. It houses the FB-T.FC-2 calibre with its architecture, totally unique in contemporary watchmaking. This manual wind movement features 15 bridges and 3 half-bridges in chamfered sapphire crystal, held in place by polished titanium pillars supporting the mechanical components. This structure is characteristic of eighteenth-century marine chronometers. With exceptional chronometric performance, this movement is regulated by a centre seconds tourbillon and a fusee and chain constant force mechanism.

FB 1.3-1 Sapphire blue

Features

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The 44 mm-diameter case is composed of a 950 platinum cylinder housing the movement. The two octagonal-shaped side pieces in polished platinum contribute to its distinctive shape. The grey ceramic lugs are secured to the case middle by two stylised titanium bolts.
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The sapphire half-bridges meet another type of demand. Corundum crystal is distinguished by its extreme properties. Its hardness is exceeded only by that of diamond. Cutting the three bridges, giving them the shape and the required drill-holes, finely chamfering their circumference, calls for ultra high-tech machining.
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The FB 1 collection of Chronométrie Ferdinand Berthoud pays tribute to this work and to the movements that pioneered chronometric precision. Its case is inspired by Ferdinand Berthoud's marine chronometers, in particular their gimbal suspension that served to maintain on-board chronometers in a permanently horizontal position.

FB 1.3-1 Sapphire blue in details

Case
Case
    • Diameter: 44 mm
    • Thickness: 13 mm 
    • Water resistance: 30 m 
    • Dynamometric crown in platinum with grey ceramic medallion 
    • Octagonal case fitted with four watertight portholes in glareproofed sapphire crystal 
    • Case in platinum with grey ceramic lugs elements 
    • Screw-in case-back with glareproofed sapphire crystal 
    • Domed, arched and glareproofed sapphire crystal
    • 5-piece limited and numbered edition 
    • Chronometer-Certified by the COSC
Movement
    • Diameter : 35.50 mm
    • Thickness : 7.96 mm
    • Lines : 15 ¾
    • Number of jewels : 46
    • Frequency: 21,600 vph (3 Hz)
    • Power reserve : 53 hours
    • Number or parts : 1119
    • Chain length : 285 mm
    • CALIBRE FB-T.FC-2 
    • Mechanical hand-wound movement 
    • Tourbillon with constant force device with fusee-and-chain transmission 
    • 3 sapphire half-bridges
Dial and hands
    • Vertical satin-finish blue dial with cut-out centre 
    • 18-carat blued (CVD) gold hours, minutes and power reserve hands 
    • Bronze rhodium-plated seconds hand
Functions and display
    • Display of the hours, minutes at 12 o’clock 
    • Central seconds 
    • Power-reserve display in an openworked subdial at 9 o’clock 
    • Tourbillon at 6 o’clock
Strap and buckle
    • Hand-sewn rolled-edge alligator leather strap 
    • Platinum double-blade length-adjustable safety folding clasp
FB 1.3-1 Sapphire blue FB 1.3-1 Sapphire blue
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