Tudor North Flag 91210N: Specs, History & Value | Ultimate Watch

The North Flag is the watch that proved Tudor could build its own engine, then never got the credit for it. Enthusiasts have spent years calling it forgotten, underappreciated, and overdue for a comeback, and the pattern in the writing is consistent: it was a genuinely important watch dressed in a design that its audience was not ready for in 2015. The yellow power reserve arc, the yellow-tipped seconds hand, and the exposed screwed bezel made it look like field equipment rather than a Submariner homage, and that cost it warmth at retail. History rewarded the substance. The MT5621 and its sibling MT5612 launched the manufacture era that made the modern Black Bay and Pelagos possible, and in 2017 Tudor even supplied the MT5612 to Breitling for the Superocean Heritage, movement content respected enough to trade between houses. Collectors who bought the North Flag early got the least-copied, most-engineered watch of Tudor's manufacture debut, on a discontinued one-reference model. On 47th Street we have watched the calls for it grow since it left the catalog. If you have one, we want to see it.