Tudor North FlagThe North Flag, with a 40 mm stainless-steel case (316L), takes design inspiration from 1970s Gerald Genta classics like the Audemars Piguet Royal Oak and Patek Philippe Nautilus. But, perhaps even more closely, the North Flag harkens back to a case shape that was significantly appreciated by the Rolex family when originally shown – the integrated lug design of the original Oyster Quartz collection also seen on the reference 1530 Oyster Date.
The MT5621 is a very serious movement. It offers a 70-hour power reserve (shown on the dial-side), and its hairspring? Yup, silicon. On top of that (and I cannot stress this enough) this movement is actually cool looking. The rotor is cut through to reveal what appear to be sand-blasted bridges. The look is sleek, technical, and just downright awesome. Consider what Tudor is looking to build both in its watches and in its brand, and the MT5621 is the physical manifestation of that. It's thoroughly modern, handsome-looking, and above all else, technical without being fussy. It beats at 4 Hz, and is regulated by a variable inertia oscillator.
Τudor’s caliber MT5621 has been designed, developed and produced in-house, including the production of the most important and essential parts. The movement has been optically finished using laser techniques, the rotor is made of tungsten and has a nice Tudor engraving. Although we love the in-house movement, the appearance of the movement would have also allowed a closed case back in my humble opinion. However, if someone ticked ‘in-house movement’ on his requirements list when buying a watch, he is probably eager to visually enjoy it as well. The Tudor North Flag caliber MT5621 movement has a power reserve of 70 hours, which is a huge plus above competitive ETA movements from Swatch Group or similar Sellita movements. The movement also has an anti-magnetic hair spring, made of silicon.
