Tuduo Kaicheng Biwan Stainless Steel Type

Tudor’s classic watch Heritage Black Bay dive watch is a new stainless steel model with matte steel ring. Tudor Heritage Black Bay Steel is equipped with the MT5612 movement manufactured by Tudor, introducing the calendar function into the Biwan series.
   This classic model is designed to commemorate the sixtieth anniversary of the birth of the Tudor Dive Watch. It inherits the tradition of exquisite craftsmanship and adds a new color to the Kai Cheng Biwan series with a steel shape. This model follows the lines and proportions of the Biwan series. The rotating outer ring is made of stainless steel with a round frosted finish to create a matte appearance and a practical overall effect, highlighting the uniqueness of the Tudor diving watch.
Tudor movement MT5612
   This movement is based on Tudor’s first home-made movement launched in 2015, and has been modified to match the unique temperament of Qicheng Biwan Steel. The hour, minute and second display functions are a major feature of the Biwan series. This series introduced the calendar function for the first time. This movement has excellent performance, accuracy and reliability, and is impeccable. Its power reserve is up to 70 hours. In other words, if you take off your watch on Friday night, you can use it normally on your wrist by Monday morning, without re-winding. The frequency of the movement is 28,800 times per hour (4 Hz), which is adjusted by the inertia fine-tuned silicon balance spring, and fixed by the cross plate, making the movement more reliable. In addition, this movement has also been awarded the Swiss Observatory certification by the Swiss Precision Timepiece Testing Center (COSC).
‘Riveted’ strap
   Tudor took inspiration from the brand’s discounted riveted straps from the 1950s and 1960s to design the Qi Cheng Biwan stainless steel strap. The links on both sides of the strap are connected by rivet heads, and the structure is stepped. These design features are famous worldwide. Qi Cheng Biwan stainless steel strap incorporates the above two aesthetic features. On the other hand, it uses solid links to integrate modern manufacturing processes. There are two optional straps for this model, and the other is a steel discount black antique belt. Each comes with an additional khaki green textured strap. The strap is made using the traditional Jacquard process in the French St-Etienne region, which is a major feature of Tudor’s Kai Cheng series. This craftsmanship originates from a local family business with a long history of 150 years.
Source of inspiration for the Biwan Collection
   The Tudor Kai Cheng Biwan stainless steel model is based on the historical tradition of the Tudor watch. It combines the past characteristics and perfectly integrates ancient and modern times. The overall shape, dome-shaped dial and mirror of the new model inherit the design essence of the first Tudor diving watch. The eye-catching winding crown and red triangle mark are derived from the ‘Large Crown’ model (model 7924) introduced by Tudor in 1958, the first Tudor watch with a water resistance of 200 meters. The red inscription on the dial indicates the deepest waterproof depth. This feature is rare in some 7923 models introduced in 1955. The ‘snowflake’ hands on the dial are distinctive and angular, borrowing from the classic style of providing watches for the French Navy in the 1970s.
Tudor diving watch

   Tudor dive watches date back to 1954, the first dive watch was 7922. The Tudor diving watch series is ergonomic, clear, easy to read, accurate, durable and sturdy. The first diving watch perfectly embodies the philosophy of American architect Louis Sullivan: shape follows function. In addition, Tudor laid the aesthetic and technical indicators for ideal diving watches, namely low-key, reliable and functional tools. Since the introduction of the original model 7922, Tudor diving watches have been continuously improved for sixty years, and each one has been unanimously appreciated by industry professionals, including the best naval officers around the world.
Kai Cheng Series
   Speaking of the main characteristics of the Tudor Kai Cheng series, I have to mention its unique creative process: reinterpret the brand classics, eclectic and freely play. The first result was the TUDOR Heritage Chrono, launched in 2010, a reinterpretation of the first TUDOR chronograph that appeared in 1970. Since then, some of the most important masterpieces in Tudor history have been reborn with a new attitude in the Kai Cheng series. This series of watches is not simply a classic replica, but a fusion of traditional aesthetic characteristics and contemporary watchmaking technology. Biwan, as the outstanding series of Tudor Kai Cheng watches, embodies Tudor’s more than 60 years of diving watch making experience, which can be described as the perfect example of the classic design of the brand.

Tudor Kai Cheng Biwan Stainless Steel

Model 79730
Case
Polished and matte steel case, 41 mm diameter
Outer ring
Stainless steel unidirectional rotating outer ring, 60-minute graduated word ring, black marking
Movement
Tudor Manufacture Calibre MT5612 (COSC)
Mechanical movement with automatic winding mechanism
Power reserve
Approx. 70 hours
Winding crown
Stainless steel screw-in winding crown with black lacquered Tudor rose logo and black anodized aluminum winding crown shaft
dial
Black, arched
Mirror
Domed sapphire crystal
waterproof
Water-resistant to 200 meters (660 feet)
Strap
Steel or antique strap with discount and safety buckle
Comes with a textured strap with a buckle