Seiko 7015-6010: Time-SonarModel: 7015 6010 Year: 1971 Features: The Movement. An early example of Seikos first foray into the world of Flyback Chronographs. The 1970s was a special decade for chronograph Seikos, with the advent of 613X movement (arguably the worlds first automatic chronograph), and the 701X movements which represent the first automatic Flyback Chronographs made by Seiko. The Design. The transparent dial is a playfully beautiful, and while the unusual design