Some tachymeter/telemeter/pulsometer watches featured spiral-fashion “snailed” scales over the dial. With the Chronoscope, Omega opted for a far more symmetrical seem that features a couple concentric circles that come with the significant scale data although also not materially distracting from core dial legibility. The advent of the 1st Submariner Day, https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/