Pilot watch model. Actually, IWC's Mark XVIII has basically turn out to be the prototype for aviation watches: substantial numerals, a giant crown, plus a triangle at twelve. Owned by Rolex, Tudor watches give rugged simplicity. Think of it as a best-excellent watch to the outdoorsman. Muted shades for instance https://www.watchesworld.com/our-watch-picks-for-a-stylish-spring/