When Seiko released their 6139-7100 chronograph wristwatches in the 1970s, it was known as the “Helmet Chronograph” because of its bulky, sloping, lug-less case that resembles a retro motorcycle helmet or an astronaut’s visor. However, because of the release of the first “Star Wars” movie in 1977, these Seiko chronographs became more popular as the namesakes of the movie characters. ...

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