Alpinist and photographer Cory Richards got a special piece of kit to join him on his recent trek up Mt. Everest. Vacheron Constantin took their Overseas Dual Time model and gave it a handful of upgrades such as a 41mm lightweight titanium case that is reinforced with one of the world's hardest metals, tantalum. Inside the watch is an in-house automatic with a 22k gold oscillating weight that is engraved with a design based on Richards' photos of Everest. Comprised of 234 components, the movement has a 60-hour power reserve and features a second timezone, day/night indication, and a date indication at 6 o'clock. It also features a tantalum crown with titanium protection and it's fitted with a Ventile strap, which is made from a technical fabric known for its waterproof characteristics.