About Tudor : Montres Tudor SA, or simply Tudor, is a Swiss watchmaker based in Geneva, Switzerland. Registered in 1926 by Hans Wilsdorf, founder of Rolex, the brand remains a sister company to Rolex; nowadays both companies are owned by the Hans Wilsdorf Foundation. In 1936, Wilsdorf took it over and went on to found the company Montres Tudor SA in 1946. Tudor's purpose was to offer a more affordable watch than Rolex while maintaining Rolex-like quality. Tudor watches were originally equipped with off-the-shelf movements paired with Rolex cases and bracelets, allowing Tudor to provide reliability and quality while achieving its price goals.
About the North Flag: Introduced in 2015 the Tudor North Flag holds a distinctive place in the brand's modern history as Tudor's first watch built around a fully in-house developed movement, the Calibre MT5621. Its design draws inspiration from the British North Greenland Expedition of the 1950s, when Tudor watches were tested under extreme conditions, resulting in a technical, instrument-like aesthetic within a robust 40mm steel case. The COSC-certified movement offers a 70-hour power reserve, complemented by a striking ceramic bezel insert. Now out of production, the North Flag has become a sought-after piece among collectors for pre-owned acquisition, valued for its engineering significance and limited availability.