Swiss watch brand TUDOR presents its new model – North Flag, which houses the brand’s first manufacture movement MT5621. A logical evolution of TUDOR’s development process, this introduction represents the first stage in a major industrial strategy aiming to provide greater independence to the brand founded by Hans Wilsdorf in 1926.
Historically, the movements used by the brand, sourced exclusively from Swiss suppliers, have always been required to achieve a high level of reliability and precision. The remit for the development of the new TUDOR movements retains these high standards, requiring an unprecedented level of performance for the brand’s products.
The new calibre, TUDOR MT5621, powering the North Flag model, provides impressive autonomy of approximately 70 hours. In addition to the hour, minute and central second functions, it provides an instant date display visible through an aperture positioned at 3 o’clock, as well as a power reserve indicator in the form of a disc at 9 o’clock. Beating to a frequency of 28,800 beats/hour or 4 Hz, the calibre TUDOR MT5621is regulated by a variable inertia oscillator with silicon balance spring spring, held in place by a traversing bridge fixed at both sides to improve resistance to shocks and vibrations. Its self-winding system is bidirectional and, a first for a TUDOR product, it is certified by the Swiss Official Chronometer Testing Institute (COSC).
Angular, finely honed and entirely satin-finished for a matt effect, the middle case of the TUDOR North Flag creates a highly technical, “scientific” perception, softened by delicate refinements typical of the high level of attention to detail that the brand injects into its products. For example, a very light curvature of its upper face allows the light to roll without a hard reflection point while the angle between its sides and lower face is cut by a polished bevel, adding to the overall delicacy of the model. The winding crown follows the same logic; prominent to ensure good ergonomics, it is lightened by its conical form. The bezel, with its circular satin finishes, is composed of two elements that complement one another and fit perfectly together. Matt ceramic, visible on the side, and brushed steel on the upper face, integrate to strengthen the general technical feel conveyed by this model. Finally, the case back is open on to the movement, visible through a sapphire crystal, an unprecedented detail for TUDOR and one which reveals it in sharp focus under the light of the crystal.
Tudor North Flag
Monobloc middle case, open back with sapphire crystal and screw-down winding crown
316Lstainless steel, satin finish
Bezel: Double bezel in steel and matt black ceramic
Winding crown: Screw-down, double water-proofness system
Crystal: Scratch-resistant sapphire
Water-proofness: 100metres (330feet)
Calibre MT5621, Manufacture TUDOR
Self-winding mechanical movement with bidirectional rotor system
Swiss Chronometer Officially Certified by the COSC (Swiss Official Chronometer Testing Institute)
Total diameter 33.8mm
Power reserve Approximately 70 hours
Variable inertia balance, micro-adjustment by screw
Non-magnetic silicon balance spring
Frequency: 28,800beats/hour (4Hz)
Centre hour, minute and seconds hands
Instantaneous date with rapid setting without non-correction range
Stop-seconds for precise time setting
Power reserve indicator via disc
Colour Black, matt finish
Hour markers White hour markers with white luminescent material, black flange with minute markers and yellow marking for the 5-minute intervals
Hands: White hour and minute hands with white luminescent material, yellow direct-drive second hand and black power reserve disc with white painted hand
Material 316Lstainless steel, satin finish
Clasp: Folding clasp and safety catch
Material Black leather with yellow stitching and yellow leather lining
Clasp: Folding clasp and safety catch
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