Some tachymeter/telemeter/pulsometer watches highlighted spiral-style “snailed” scales to the dial. To the Chronoscope, Omega opted for a more symmetrical appear that features a number of concentric circles which include the essential scale info even though also not materially distracting from core dial legibility. Beginning production simultaneously since the ref. 6200, https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/