This is a rare TAG Heuer Monaco Sixty Nine (Reference CW9110), an innovative avant-garde timepiece originally launched in 2003. [1, 2] Key Features Reversible Case: This unique design features a dual-sided swiveling watch face. [1, 2] Analog Side: The side visible in your image features a classic, black matte dial with a mechanical, manual-winding TAG Heuer Calibre 2 movement and a subsidiary seconds sub-dial at 6 o'clock. [1, 2] Digital Side: When flipped over, the reverse side reveals a quartz-powered digital display running a high-accuracy chronograph capable of measuring down to 1/1000th of a second, alongside functions like a lap timer, perpetual calendar, dual time zone, and alarm. [1, 2, 3] Dimensions: The distinct square case measures approximately 40mm x 41mm, but stands famously thick on the wrist at roughly 18mm tall to house the dual-movement sandwich architecture Ultra Rare watch in top condition. Will ship insured