Some tachymeter/telemeter/pulsometer watches featured spiral-type “snailed” scales on the dial. For the Chronoscope, Omega opted for a far more symmetrical glance that features a couple of concentric circles that come with the significant scale information while also not materially distracting from core dial legibility. The advent of the primary Submariner https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/