TAG Heuer introduces the last Calibre 12 Monaco model with a stunning grey dial. Outfitted with a classic black alligator leather strap, this stainless-steel model features a vertically brushed ruthenium dial. As the final edition of the Monaco Calibre 12, only 1,000 of these models exist and the stainless-steel caseback of each watch is engraved with its limited-edition number.