There's a beautifully special double index at 12 o’clock for orientation. At six o’clock, you've got the signature – since the Aquatimer are available in the two tritium or Luminova variants, you’ll see both equally “T SWISS Manufactured T” and “SWISS Produced” signatures. A Notice to the tritium variations: IWC https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/