A Patek Philippe wristwatch is among the most coveted symbols of luxury. A Patek in steel even more so because the venerable Swiss brand make so few of them, it is believed that steel watches make up only about 20 percent of their annual production. So the arrival of model in the aforementioned metal is nothing thing short of an event for the Patek faithful. To mark the completion of its new production building in Plan-les-Ouates, Geneva, the Swiss brand has today announced the launch of a new limited edition in steel in its classic Calatrava line. Meet the Calatrava Ref. 6007A-001, which will be limited to just 1,000 pieces.