Some tachymeter/telemeter/pulsometer watches highlighted spiral-model “snailed” scales within the dial. With the Chronoscope, Omega opted for a more symmetrical look that encompasses a few concentric circles that come with the critical scale info even though also not materially distracting from core dial legibility. Please Notice that starting off in 2005, https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/