Swatch Bioceramic Flower Power Collection Swiss Quartz Watch With A Black, ’60s Inspired Silicone Strap, 34mm Bioceramic Case & Yellow Coloured Dial. This rainbow gradient watch is all about ’60s inspired style with its solid-black BIOCERAMIC case, a biosourced glass, a black silicone strap with multi-colored printed symbols and rainbow print dial with glow-in-the-dark hands. The word 'Peace' replaces the date window in this watch.