Tudor Black Bay Chrono Original Box & Papers AMAZING CONDITION

Tudor Black Bay Chrono S&G Steel & Gold Co-Axial Chronometer Original Box and Papers!


The Black Bay Chrono is where Tudor stopped borrowing other people's chronograph movements and showed up with one of the most compelling value propositions in modern watchmaking. The Manufacture Caliber MT5813 at its core is built by Breitling on the architecture of their celebrated B01 — the same fundamental platform that shares engineering DNA with the Rolex Caliber 4130 in the Daytona, reportedly developed by many of the same engineers before they crossed over. What Tudor gets out of that arrangement is a proper column-wheel chronograph with a vertical clutch — the two features that separate a serious chrono movement from a cam-actuated parts-bin job — plus a silicon hairspring for magnetic resistance and thermal stability, a free-sprung variable-inertia balance, and a 70-hour power reserve that means you can take it off Friday night and strap it back on Monday morning without reaching for the crown. It runs at 28,800 vph, carries COSC chronometer certification, and Tudor holds it to a tighter standard than COSC requires: -2/+4 seconds per day versus the institute's -4/+6 allowance. The 45-minute elapsed-time register at 3 o'clock (rather than the typical 30) is a Tudor-specific modification, and the sandblasted bridge finishing with Tudor's signature rotor design distinguishes it visually from its Breitling cousin. For what this watch costs, there is no better-specified Swiss chronograph movement on the market. Full stop.


What makes this particular reference hit differently is the S&G treatment — Steel & Gold — which takes the Black Bay Chrono's already muscular case and dresses it up just enough to make it dangerous. The fixed bezel is solid 18K yellow gold with a matte black anodized aluminum tachymeter disc that keeps the gold markings legible without tipping into jewelry-store territory. The domed black dial sits behind a domed sapphire crystal — both curves borrowed directly from Tudor's 1950s divers — and carries the signature Snowflake hands in a slimmed-down chronograph profile, with luminous round applied indices and twin sub-registers at 3 and 9. The screw-down pushers at 2 and 4 are solid yellow gold, the crown is steel capped with a 0.3mm gold layer stamped with the Tudor rose, and the five-link riveted bracelet weaves solid gold center links at 6 and 12 o'clock with gold-capped steel links in between. At 41mm across, 50mm lug-to-lug, and 14.4mm thick, it wears like a proper sport chronograph — this is not a slim watch, and it doesn't pretend to be. The 200m water resistance, helium-free screw-down case, and that tachymeter bezel say racetrack and reef in equal measure. This is the Black Bay Chrono for people who want the two-tone look without a single gram of apology.


KEY DETAILS
Name: Tudor Black Bay Chrono S&G
Reference: M79363N-0001
Case Material: Stainless Steel with polished and satin finish
Case Diameter: 41mm
Case Thickness: 14.4mm Lug-to-Lug: ~50mm
Lug Width: 22mm
Bezel: Fixed, solid 18K yellow gold with matte black anodized aluminum disc, tachymeter scale with yellow gold markings
Crystal: Domed sapphire
Caseback: Solid steel, screw-down
Dial: Gold, domed, with luminous applied round indices, date window at 6 o'clock, sub-registers at 3 o'clock (45-minute counter) and 9 o'clock (running seconds)
Lume: SuperLuminova (hands and indices)
Movement: Tudor Manufacture Caliber MT5813 (COSC certified, based on Breitling B01 architecture)
Jewels: 41
Frequency: 28,800 vph (4 Hz)
Power Reserve: Approx. 70 hours
Precision: COSC Chronometer certified (Tudor spec: -2/+4 sec/day)
Functions: Hours, minutes, small seconds (at 9 o'clock), chronograph with central seconds and 45-minute counter (at 3 o'clock), date (at 6 o'clock)
Water Resistance: 200 meters / 660 feet
Bracelet: Oyster
Crown: Screw-down, steel with 0.3mm 18K yellow gold cap, Tudor rose in relief
Pushers: Solid 18K yellow gold, screw-down, at 2 and 4 o'clock
Special Features: Column-wheel chronograph mechanism, vertical clutch, silicon hairspring, free-sprung variable-inertia balance, tungsten monobloc bi-directional rotor, 45-minute elapsed-time register, five-year transferable Tudor guarantee