Seiko Skyliner 21 Jewels – Ref. 6100-8000 – 37 mm – Manual Wind – Gold-Plated Case – Vintage Japan

From Seiko’s elegant Skyliner line, this 6100-8000 keeps all the right vintage cues: slim manual-wind movement, silver sunburst dial, and a classic gold-plated case that wears beautifully at 37 mm. It’s Japan-domestic and still presents very well on the wrist. • Model/Ref: Seiko Skyliner 6100-8000 (JDM) • Movement: Cal. 6100, 21 jewels, manual wind (“cót tay”); winds/sets correctly in my checks • Case: Gold-plated over base metal; vintage surface hairlines present • Size: 37 mm diameter (excl. crown) • Thickness ~9.1 mm • Lug-to-lug ~41 mm • Lug width 18 mm • Crystal: Acrylic/plexi with light scratches (typical for age) • Dial/Hands: Silver sunburst with applied baton markers; dauphine hands • Bracelet: Vintage gold-tone expansion bracelet (period style). I can swap to a new leather strap on request. • Country of origin: Japan (nội địa) • Condition: Vintage pre-owned—presents nicely with honest wear; see photos for exact condition • Water resistance: Not pressure-tested—treat as splash-only • What’s included: Watch only (no box/papers)