During the same period, the watchmakers of the Japanese manufacture also innovated in the field of mechanical chronographs, in particular with the development of a heart-shaped cam, a characteristic which therefore offered a level of precision that has been achieved. thought impossible to achieve with manual chronographs.
Then, in 1969, Seiko presented the Seiko Speedtimer with caliber 6139. “ It was the first
automatic chronograph in the world with a column wheel and a vertical clutch »Assures the brand in its press release. Two devices which brought real improvements in the measurement of time and which are, even today, a prerequisite for chronographs of beautiful invoices.
Today, six new watches inspired by the Speedtimer join the Prospex collection. Among them, a new limited-edition automatic chronograph that pays homage to the 1964 chronometer, while a second version with the same caliber and a series of four solar chronographs complete the line.
