There's a splendidly exclusive double index at twelve o’clock for orientation. At six o’clock, you've got the signature – as the Aquatimer can be found in equally tritium or Luminova variants, you’ll see equally “T SWISS Built T” and “SWISS Designed” signatures. A note on the tritium variations: IWC required https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/