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