Sinn — 903
903 St II Navigation Chronograph
Produced 2024–present. The 903 St II is the second-generation of Sinn's Navigation Chronograph, launched in 2024 as a refined revival of the brand's 1970s pilot-navigation instrument. It combines a slide-rule bezel with hybrid-ceramic…
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Reference903.090
BrandSinn
Family903
Produced2024–present
StatusIn production
Full reference dossier
Specifications, configurations, image gallery, market listings, lineage and notable appearances are part of the full reference.