Some tachymeter/telemeter/pulsometer watches featured spiral-fashion “snailed” scales to the dial. To the Chronoscope, Omega opted for a more symmetrical glance that contains a few concentric circles that include the crucial scale details though also not materially distracting from Main dial legibility. Afterwards examples are available inside the superior 4 figures https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/