Thinner and sleeker than the 6139, the 7017 could be delivered in a more compact package, and featured a “flyback” function that allowed for the chronograph sweep to be reset without having to first stop the mechanism.
The 8000 from June of 1980 is a fantastic example that’s been incredibly well preserved. The blocky shape of the case is offset by contoured lines and smooth finishes that give it a great vintage racing feel with a case width of 40mm. The minty dial is a deep matte black countered by a white minute track and an orange decimal chapter. The Speed Timer logo in its signature orange sits between the Seiko and 5 markings at top centre, and a 70-proof designation at bottom which appears on only the earliest versions. The day can be toggled between English and Kanji, and is paired alongside the date.