Casio Unisex Digital Ring Watch CRW-001-1DRCasio Unisex Digital Ring Watch CRW 001 1DR A ring sized watch from Casio Watches. A whole new style of digital watch both practical and playful thanks to a miniature module and advanced metalworking technology. Creating a ring sized, full metal version of the Casio watchs complex form is no easy feat. To make this possible, we needed to use a special method of metal processing to inject a mixture of fine metal powders and resin into a mold. Using