This incredibly rare, steel Heuer Carrera 2547NS “Dato 12” is one of the most complicated watches ever produced by Heuer. It has its original, silver-on-black reverse “panda” dial, with the outer date ring and sub-registers contrasting beautifully against the matte black dial. The watch also has matching, all original patina on the tritium hour markers and hands. Finally, it has its original, Heuer-signed crown and comes on a black leather rally strap.