Some tachymeter/telemeter/pulsometer watches highlighted spiral-design “snailed” scales around the dial. For the Chronoscope, Omega opted for a more symmetrical seem that encompasses a few concentric circles that come with the important scale details though also not materially distracting from Main dial legibility. You need to observe a few basic ways https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/