Some tachymeter/telemeter/pulsometer watches featured spiral-style “snailed” scales to the dial. To the Chronoscope, Omega opted for a far more symmetrical appear that includes a couple of concentric circles that include the essential scale information and facts even though also not materially distracting from Main dial legibility. 6200 and ref. 6205. https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/