The Gucci G-Flat YA166401 is a 36mm stainless steel watch featuring a black opaline dial with Roman numerals at 12 and 6 o'clock, and a date display at 3 o'clock. It is powered by an automatic movement with a 50-hour power reserve and offers water resistance up to 50 meters. The watch is completed with a stainless steel bracelet and sapphire crystal with anti-reflective coating. Reference number: YA166401.