The Casio CRW-001G-9J is a groundbreaking "Ring Watch" released to celebrate the 50th Anniversary of Casio watches. This fully functional digital timepiece shrinks the iconic retro-digital aesthetic into a wearable ring, utilizing advanced Metal Injection Molding (MIM) technology to craft a complex, single-piece stainless steel case with a luxurious Gold Ion-Plated finish. Despite its diminutive size (roughly 1/10th the size of a standard wristwatch), this ring is powered by a custom miniature module that offers legitimate utility. It features a clear 6-digit LCD that displays hours, minutes, and seconds. Practical functions include Dual Time, a 1/100-second stopwatch, and a unique Flashing Light function that pulses at the top of the hour or at a set time (acting as a silent visual alarm). The ring is sized at US Size 10.5 (Japanese Size 22) with an inner diameter of 20mm. It includes two spacers to adjust the fit down to Size 19 (19mm) or Size 16 (18mm), ensuring versatility for different fingers. The "watch" is water-resistant for daily use (splash proof) and runs on a replaceable battery. This is a rare, collectible piece of wearable tech that perfectly embodies Casio's legacy of playful innovation.