Seiko Prospex Speedtimer

The original Seiko Speedtimer, released in 1969, was among the world's first self-winding chronograph watches, equipped with the legendary Caliber 6139. When Seiko revived the Speedtimer, as part of its sport-oriented Prospex collection, it decided to eschew the automatic mechanical movement in favor a new, high-tech, solar-powered one, Caliber V192, which enhances reliability and runs up to six months on a single charge from any light source. The motorsport-inspired tachymeter scale is etched into the stationary bezel, and the dial's intuitive design uses red detailing for the central seconds hand and the elapsed minutes hand on the 6 o'clock subdial at 6 o'clock for easy reading of the chronograph displays.