Luxury Sapphire Crystal GMT Tourbillon Mechanical Wristwatches for MenEquipped with a manual day and night tourbillon mechanism, this gorgeous wristwatch for men is a perfect mix of luxury and functionality. Waterproof and shock resistant, this mechanical watch comes with features such as multiple time zone, moon phases, and more. Placed in a round stainless steel case, its sapphire crystal glass offers ample protection while the durable leather band stays secure owing to its folding clasp! Specifications Water