Some tachymeter/telemeter/pulsometer watches highlighted spiral-design “snailed” scales around the dial. For your Chronoscope, Omega opted for a far more symmetrical glance that features a number of concentric circles that come with the vital scale info even though also not materially distracting from Main dial legibility. Such as ref. 6536 previously https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/