There's a incredibly unique double index at twelve o’clock for orientation. At six o’clock, you've got the signature – as the Aquatimer are available in equally tritium or Luminova variants, you’ll see equally “T SWISS Created T” and “SWISS Designed” signatures. A Be aware about the tritium versions: IWC needed https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/