TUDOR Black Bay Chrono S&G

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Tudor has been producing watches that are closely tied to the world of motor sport since the presentation of the Oysterdate in 1970, the brand’s first chronograph. In the same way, since 1954 Tudor has been constantly refining its professional divers' watches. The Black Bay Chrono S&G model combines these traditions in a sport-chic chronograph, with contrasting sub-counters and a high-performance automatic Manufacture Calibre, with column wheel and vertical clutch.

KEY POINTS
1. Satin-brushed and polished case in 316L steel and yellow gold, 41 mm in diameter, with a fixed bezel in yellow gold, insert in black anodised aluminium featuring a tachymetric scale
2. Domed, frosted matt black or champagne-colour sunray satin-finish dial with contrasting circular sub-counters
3. “Snowflake” hands, a hallmark of TUDOR divers’ watches introduced in 1969, with Grade A Swiss Super-LumiNova® luminescent material
4. Manufacture Calibre MT5813 chronograph, COSC-certified, with a silicon balance spring, 70-hour power reserve, column wheel and vertical clutch
5. A choice of three bracelet designs: black Jacquard fabric, bund in dark brown aged leather or riveted 316L steel and yellow gold
6. Five-year transferable guarantee with no requirement for registration or periodic maintenance checks

The Manufacture Calibre MT5813, which powers the Black Bay Chrono S&G model, displays hours, minutes, seconds, chronograph and date functions. It has the finish typical of TUDOR Manufacture Calibres. Its rotor in tungsten monobloc is openwork and satin-brushed with sand-blasted details and its bridges and mainplate have alternate sand-blasted and polished surfaces and laser decorations.

Boasting a 70-hour power reserve and a silicon balance spring, the Manufacture Chronograph Calibre MT5813 is certified by the Swiss Official Chronometer Testing Institute (COSC), with its performance exceeding the standards set by this independent institute. In fact, where COSC allows an average variation in the daily running of a watch of between -4 and +6 seconds in relation to absolute time in a single movement, TUDOR insists on between -2 and +4 seconds’ variation in its running when it is completely assembled. A high-performance movement, it was crafted in the purest watchmaking tradition, with a column wheel mechanism and vertical clutch. In keeping with the TUDOR philosophy of quality, it presents extraordinary robustness and reliability, guaranteed by the array of extreme tests applied to all TUDOR products.

Derived from the Manufacture Calibre Breitling 01 chronograph, with a high-precision regulating organ developed by Tudor and exclusive finishes, this movement is the result of a lasting collaboration between the two brands, which have chosen to pool their expertise in the design and production of certain mechanical movements so that both parties can benefit from their use.

REFERENCE 79363N

CASE
41-mm 316L steel case with polished and satin finish

BEZEL
Fixed yellow gold bezel with matt black anodised aluminium disc with tachymetric scale, gold-plated markings

WINDING CROWN
Yellow gold screw-down winding crown with the TUDOR rose in relief
Yellow gold screw-down pushers at 2 and 4 o'clock

DIAL
Black with gold counters, or champagne-colour with black counters, domed
Date at 6 o'clock

CRYSTAL
Domed sapphire crystal

WATERPROOFNESS
Waterproof to 200 m (660 ft)

BRACELET
Riveted 316L steel and yellow gold bracelet with polished and satin finish, or dark brown leather strap with removable bund with steel folding clasp and safety catch, or black fabric strap with buckle

MOVEMENT
Manufacture Calibre MT5813 with chronograph function
Self-winding mechanical chronograph movement with bidirectional rotor system

POWER RESERVE
Approximately 70 hours

PRECISION
Swiss chronometer officially certified by the COSC
(Swiss Official Chronometer Testing Institute)

FUNCTIONS
Hour and minute hands at the centre
Chronograph seconds at the centre
Chronograph 45-minute counter at 3 o'clock
Small second hand at 9 o’clock
Instantaneous date at 6 o'clock with rapid adjustment without non-correction range
Stop-seconds for precise time setting

OSCILLATOR
Variable inertia balance, micro-adjustment screw
Non-magnetic silicon balance spring
Frequency: 28,800 beats/hour (4 Hz)

TOTAL DIAMETER
30.4 mm

THICKNESS
7.23 mm

JEWELS
41 jewels