There's a beautifully special double index at twelve o’clock for orientation. At 6 o’clock, you have got the signature – since the Aquatimer can be found in each tritium or Luminova variants, you’ll see equally “T SWISS Manufactured T” and “SWISS Designed” signatures. A note over the tritium variations: IWC https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/