Some tachymeter/telemeter/pulsometer watches highlighted spiral-design “snailed” scales about the dial. To the Chronoscope, Omega opted for a far more symmetrical look that features a couple concentric circles which include the essential scale information and facts while also not materially distracting from Main dial legibility. Such as the ref. 6536 above, https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/