Tudor - Black Bay 54 – Blue – 79000 – 2025

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Location: United States

Year: 2025

Reference number: 79000

Accessories: Original Box and Papers

Condition: Very Good

Material: Stainless Steel

Color Dial: Blue

The Tudor Black Bay 54 reference M79000-0001, known as the “Lagoon Blue,” combines a textured, domed blue dial with the compact proportions of Tudor’s earliest diving watches. Its 37mm stainless-steel case is framed by a mirror-polished steel bezel insert without traditional printed minute graduations, giving the watch a clean, distinctly summery appearance.

Inside is Tudor’s COSC-certified Manufacture Calibre MT5400, a self-winding movement with a silicon balance spring and approximately 70 hours of power reserve. The polished and satin-finished five-link bracelet incorporates Tudor’s rapid-adjustment “T-fit” clasp for improved comfort.

Specifications

• Brand: Tudor

• Collection: Black Bay 54

• Nickname: Lagoon Blue

• Reference: M79000-0001

• Year: 2025

• Case: Stainless steel with polished and satin finishes

• Case Diameter: 37mm

• Case Thickness: 11.2mm

• Lug Width: 20mm

• Bezel: Unidirectional 60-minute stainless-steel bezel

• Bezel Insert: Mirror-polished steel without printed minute graduations

• Dial: Domed and textured Lagoon Blue

• Movement: Tudor Manufacture Calibre MT5400, mechanical and self-winding

• Power Reserve: Approximately 70 hours

• Frequency: 28,800 vibrations per hour

• Crystal: Domed sapphire

• Caseback: Screw-down stainless steel

• Water Resistance: 200 metres

• Bracelet: Five-link stainless-steel bracelet with polished and satin finishes

• Clasp: Tudor “T-fit” rapid-adjustment clasp

• Functions: Hours, minutes and central seconds

• Certification: COSC-certified chronometer

• Special Features: Silicon balance spring, bidirectional winding rotor, screw-down crown and luminescent Snowflake hands.