Tudor
North Flag
91210N
Tudor's in-house Arctic explorer, built for the pole and beyond.
An estimate from current market data — not an offer. Your actual value depends on condition, completeness, and authentication.
Get an instant offerFree insured shipping. Paid within 48 hours of inspection.
Overview
The Tudor North Flag ref. 91210N is a sport watch introduced in 2015 as a showcase for Tudor's first fully in-house movement, the MT5621. Housed in a 40 mm steel and ceramic case, it pairs robust construction with a bold black dial accented in yellow — a palette drawn directly from the iconography of polar exploration. The reference remained in production until around 2020, occupying a distinctive place in Tudor's modern catalogue as both a technical statement and a design exercise.
History
The North Flag line was launched at Baselworld 2015 and represented a landmark moment for Tudor: the public debut of the manufacture calibre MT5621, developed entirely within the Rolex group's facilities. The model's name and visual language paid homage to the Tudor-sponsored expeditions to the Arctic, continuing a long tradition of the brand aligning itself with extreme-environment exploration. The 91210N, with its ceramic bezel insert and steel case, was the steel-bracelet expression of the line. Production concluded around 2020 as Tudor's portfolio evolved, leaving the North Flag as a relatively short-lived but historically significant reference.
Notable points
- The MT5621 was Tudor's first fully in-house manufacture movement, a significant milestone for the brand's independence and watchmaking credibility.
- The 40 mm steel and ceramic case construction brought material modernity to the sport-watch format, with ceramic contributing scratch resistance to the bezel.
- The black dial with yellow accents directly references the visual identity of polar exploration gear, giving the watch an immediately recognisable graphic character.
- The North Flag line marked Tudor's deliberate repositioning as a manufacture brand rather than a movement-sourcing satellite of its parent group.
- A relatively compact production window of approximately five years makes the 91210N a defined chapter in Tudor's in-house movement story.
