Some tachymeter/telemeter/pulsometer watches highlighted spiral-model “snailed” scales to the dial. For your Chronoscope, Omega opted for a far more symmetrical search that incorporates a several concentric circles that include the vital scale facts when also not materially distracting from Main dial legibility. Afterwards illustrations are available from the large 4 https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/