The Philipp Plein PWAAA1121 The $kull is a watch with a case diameter of 44 mm. Most striking feature of this model is the skull of inlaid Swarovski crystals on the dial. Philipp Plein is an iconic fashion designer and it shows in this watch. The $kull is a quartz watch with a battery. The silicone watch strap is flexible and fits snugly on your wrist.