No cheating by traveling through time! The TARDIS flies around the vortex each minute on this Doctor Who watch. Wear it so you're not late on your travels through time and space! The 38 mm diameter Doctor Who TARDIS Vortex Watch features a Japanese quartz movement and a 1-year warranty. If you're familiar with UPG's watches, this one is 5 mm larger than most. Water resistant, not waterproof.