Mens STORM Styro Slate Blue Analoque Quartz Watch with Blue Dial and Black Milanese Strap 47487/SL/B. The STORM Styro is a classic looking watch with a modern twist. A stunning graduated dial in a range of intense colours features Photochromic glass. This technique stems from Storm's laser glass technology and enables the dials to change colour at under different lighting. Styro is water resistant to 50m and features a thick mesh band made from matt black stainless steel.