Where to buy replica Omega Speedmaster chronoscope watches? The word “Chronoscope” cleverly combines two traditional Greek concepts: “Chronos” symbolizes time, and “Scope” represents observation. It originally refers to a precision instrument specially used to measure the duration between two locations or two events. The Omega Speedmaster Chronoscope watch cleverly combines the three functions of tachymeter, telemeter and pulsometer into one, showing excellent performance.