You will find a incredibly exclusive double index at twelve o’clock for orientation. At six o’clock, you've the signature – since the Aquatimer can be found in both tritium or Luminova variants, you’ll see equally “T SWISS Produced T” and “SWISS Built” signatures. A note about the tritium variations: IWC https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/