Seiko Prospex Speedtimer – pioneering of automatic chronograph watch.
Seiko "Speedtimer" first produced in the 1970s. The watch gained popularity among collectors due to its historical significance and distinctive design. The "Speedtimer" name originates from the combination of the watch's chronograph function and the word "timer," indicating its intended use for timing events and activities since they are featured in Chronograph Movement, Unique Dial Design, Integrated Tachymeter Scale that allows the wearer to calculate speed based on the time it takes to travel a known distance. Today, these reinterpretation Speedtimer models are highly sought after by vintage watch enthusiasts. The watch's popularity is attributed to its historical significance, distinctive design, and the reputation of Seiko's watchmaking excellence.