Seiko 6139 „Helmet" Automatik-Chronograph – sehr seltene weiße Variante mit gelben Indizes – vollständig revidiert (2026) – originales Seiko-Stahlband – Gehäuseboden nicht modellrein Kompessoruhr harmonious aftermarket bracelet from Maruman

harmonious aftermarket bracelet from Maruman (Japan)

Background: Citizen – Seiko's Great Rival in the Quartz Era

well-maintained original condition with only minimal signs of wear

Battery: freshly changed

Seiko 6139 „Helmet" Automatik-Chronograph – sehr seltene weiße Variante mit gelben Indizes – vollständig revidiert (2026) – originales Seiko-Stahlband – Gehäuseboden nicht modellrein Kompessoruhr harmonious aftermarket bracelet from MarumanThis is no ordinary vintage Seiko, but a piece of genuine watchmaking history with cult status: the Seiko 6139 was the world's first automatic chronograph in 1969 and the first automatic chronograph to fly into space. This very beautiful, fully serviced example from the early 1970s is the very rare white dial variant of the legendary "Helmet" with yellow indices as a Japanese Domestic Market (JDM) version with a bilingual Kanji English day display and