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Seiko 6139 guide
Seiko 6139 guide










seiko 6139 guide

The company even named their automatic chronograph the “El Primero” or “The First” in Spanish. The first watch company to lay claim to the title was Zenith, who introduced their first prototypes on January 10, 1969. Back in 1969, several big names were competing for the title of the world’s first automatic chronograph. There is still debate in terms of which watch holds claim to the title of world’s first automatic chronograph, but really, it all boils down to which type of “first” you would consider most appropriate. The 600X has two big claims to fame, as both a contender for the world’s first automatic chronograph and as the first chronograph worn in space. The 6139-600X series is quickly becoming very collectable pieces thanks to a combination of great design and storied history. Production of the Seiko 6139 line up ended sometime in 1978, but are still readily available today. Seiko printed the term “Speed-Timer” on many of its early chronographs destined for the Japanese market, indicating the more advanced features, such as a thirty-minute chronograph recorder, a day and date indicator, and a tachymeter scale. This article focuses on its earliest incarnations, the 6139-600X. In 1969, Seiko delivered by introducing what was arguably the world’s first automatic chronograph, the Seiko 6139. The 1960s saw many in the watch industry looking to capitalise on increased demand for automatic watches.












Seiko 6139 guide