Casio Watch 50th Anniversary Casio Ring Watch CRW-001-1JR | eBay,Casio has officially unveiled the CRW-001-1JR, a groundbreaking ring-shaped digital watch celebrating its 50th anniversary. Crafted using advanced Metal Injection Molding (MIM) technology, the stainless steel design is compact—measuring just 25.2 x,CRW001-1,Casio's CRW-001-1JR Ring Watch: Timekeeping Literally at Your Fingertips | stupidDOPE