Some tachymeter/telemeter/pulsometer watches featured spiral-style “snailed” scales about the dial. For your Chronoscope, Omega opted for a far more symmetrical seem that contains a couple of concentric circles that include the critical scale details although also not materially distracting from core dial legibility. Tag Heuer Carrera 'Glassbox' Chronograph I've had https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/