Casio is celebrating their 50th anniversary by bringing back the very first ring watch. 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 watch’s complex form is no easy feat. To make this possible, they needed to use a special method of metal processing to inject a mixture of fine metal powders and resin into a mold. Using metal injection molding (MIM), the case, case back, and ring are molded in one piece, with even the dimpled design on the band faithfully reproduced. A special glass adhesive technique ensures a tight seal for a watch built to be water-resistant while still allowing the battery to be replaced.With an inner diameter of 20 mm and a circumference of 62.8 mm, making it a ring size 10.5. Two size adjusting spacers are included, making it adjustable to a size 8 and a size 9.Casio downsized the standard watch module by a factor of 10 and combined it with a small button battery to create a 3-button digital watch that fits on your finger. Even at this small size, the watch features a 7-segment LCD that displays not only the time down to the second, but also the date, dual time, and stopwatch functionality. Preset the time of your choice, and the ring watch gives off a subtle, flashing light — not only handy for keeping time, but also a poetic nod to the fleeting twinkle of time.Case size (L× W× H): 25.2 × 19.5 × 6.2 mmWeight: 16 gCase and bezel material: Stainless steelApprox. battery life: 2 years on SR621SWWater resistantMineral GlassDual time1/100-second stopwatchTime flash (daily and every hour on the hour)LED backlightAuto-calendar (28 days for February)Casio G-Shock Style #: CRW001-001...