Product Overview
The Tudor Heritage Black Bay Chrono Chronograph Automatic Chronometer is a precision-crafted men’s watch that blends vintage-inspired design with modern mechanical excellence. Built for watch enthusiasts and professionals who value both form and function, this timepiece features a robust 41 mm steel case and a high-performance in-house movement certified by COSC. With a striking black dial and a tachymetric scale on the fixed bezel, it delivers authentic chronograph functionality in a refined, wearable package. Whether worn during active pursuits or as a statement accessory, this watch reflects Tudor’s commitment to heritage, durability, and Swiss craftsmanship. 
Key Features
- 41 mm Steel Case with Polished and Satin Finish: The case combines polished and satin-brushed surfaces for a balanced, sophisticated look that resists daily wear while maintaining visual depth and contrast.
- Fixed Steel Bezel with Black Lacquered Tachymetric Scale: The unidirectional bezel features a clearly engraved tachymeter, lacquered in black for enhanced legibility and a sleek, cohesive aesthetic ideal for measuring speed over distance.
- Manufacture Calibre MT5813 (COSC-Certified): This self-winding mechanical movement features a bidirectional rotor system and is officially certified as a chronometer by COSC, ensuring exceptional accuracy and reliability.
- 70-Hour Power Reserve: The movement stores enough energy to run for approximately 70 hours, allowing the watch to maintain timekeeping even after a weekend off the wrist.
- Steel Screw-Down Crown with TUDOR Rose Engraving: The crown is engraved with the iconic TUDOR rose and lacquered in black, paired with a black anodized aluminium crown tube for enhanced water resistance and a distinctive visual signature.
- Domed Black Dial: The dial features a classic domed profile that enhances readability and adds a vintage character, complemented by luminous markers for visibility in low-light conditions.
- Domed Sapphire Crystal: The crystal is made of scratch-resistant sapphire with a domed shape that echoes historical watch designs while providing modern durability.
- 200 m (660 ft) Water Resistance: Engineered for aquatic use, the watch is suitable for swimming, snorkeling, and other water-based activities, thanks to its screw-down crown and robust case construction.
- Multiple Strap Options: Comes with a steel bracelet featuring a folding clasp and safety catch, a leather strap, and an additional fabric strap with buckle—all included in the box for versatile styling.
Technical Specifications
- Model Number: M79350-0004
- Case Material: Steel with polished and satin finish
- Case Diameter: 41 mm
- Bezel: Fixed steel with engraved tachymetric scale, lacquered in black
- Movement: Manufacture Calibre MT5813, self-winding mechanical with bidirectional rotor
- Certification: COSC Chronometer
- Power Reserve: Approximately 70 hours
- Crown: Steel screw-down crown with TUDOR rose engraving, black lacquer, and black anodized aluminium tube
- Dial: Black, domed
- Crystal: Domed sapphire
- Water Resistance: 200 meters (660 feet)
- Bracelet/Strap: Steel bracelet with folding clasp and safety catch; leather strap; fabric strap with buckle (all included)
- Item Weight: 2.2 pounds
- Department: Mens
- Date First Available: July 21, 2017
- Manufacturer: TudorWatch
- ASIN: B074DBXV11
- Discontinued by Manufacturer: No
Benefits & Use Cases
This watch is ideal for individuals who appreciate mechanical precision and timeless design. Its chronograph function makes it suitable for timing events, sports, or professional tasks requiring accurate elapsed time measurement. The 200-meter water resistance allows confident use during water sports, swimming, or rainy conditions. The inclusion of three different straps—steel, leather, and fabric—enables easy adaptation from casual to formal settings. The COSC-certified movement ensures reliable performance for daily wear, while the domed sapphire crystal and robust case construction offer long-term durability.
Important Notes
Please refer to the manufacturer’s official website or documentation for detailed warranty information. The product is not discontinued and remains available as of the last update. All strap options are included in the original packaging. Care should be taken to avoid impacts to the crystal and case, and regular maintenance is recommended to preserve water resistance and movement performance. Always ensure the crown is fully screwed down before exposure to water.