Like all models in tudors collection of tool watches the tudor north flag features sporty lines and entirely matt finishes the brushed middle case sandblasted details and matt colours visually reinforce the technological prowess of the watch case 40 mm steel case with satin finish open back with sapphire crystalbezel double bezel in steel and matt black ceramicmovement mt5621 manufacture tudor cosc self winding mechanical movement with bidirectional rotor systempower reserve po