{"product_id":"serviced-rare-vintage-1950s-seiko-unique-nivaflex-15-jewels-u13050-seikosha","title":"(SERVICED) Rare Vintage 1950s Seiko Unique Nivaflex 15 Jewels - U13050 Seikosha","description":"\u003cp\u003e[AVAILABLE ✅] - Post-War Heritage: 1950s Seiko Unique Nivaflex 15 Jewels (Ref. U13050)\u003c\/p\u003e\n\n\u003cp\u003eThis serviced Rare Vintage 1950s Seiko Unique Ref. U13050 represents a poetic chapter in the history of the Suwa Seikosha factory, serving as a vital bridge between the early post-war era and the birth of the modern Japanese dress watch. Driven by the robust 15-jewel manual-winding movement, this model was among the first to feature the innovative Nivaflex mainspring - a technical breakthrough at the time that provided unbreakable durability and more consistent power delivery.\u003c\/p\u003e\n\n\u003cp\u003eHaving been recently serviced, the timepiece offers a smooth, tactile winding engagement and reliable timekeeping that honors its 70-year heritage. The dial is a stunning example of mid-century character, remaining in 100% original condition with a charming aged patina that only decades of history can bestow. It features the iconic \"S\" logo, heat-blued steel hands that shimmer under the light, and a mix of applied numerals and arrow indices that reflect the elegant, utilitarian aesthetic of the 1950s.\u003c\/p\u003e\n\n\u003cp\u003eThe stainless steel case remains in excellent vintage condition, preserving its original factory geometry and the delicate, slim profile that defines the Unique series. The watch head is entirely factory-correct, featuring the original dial, crystal, case, and crown, ensuring it meets the high historical standards sought by serious collectors. While the head is completely original, it has been paired with a high-quality replacement strap to perfectly complement its classic, timeless silhouette.\u003c\/p\u003e\n\n\u003cp\u003eCollectors prize the Seiko Unique for its role as the ancestor to the legendary Marvel and Lord Marvel lines. This 1950s specimen offers a superb combination of mechanical purity and authentic vintage soul - a foundational and highly significant addition to any serious vintage Seiko collection.\u003c\/p\u003e","brand":"HN Vintage Pieces","offers":[{"title":"Default Title","offer_id":50259828211905,"sku":"SEIKO-0060","price":220.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0861\/7250\/0161\/files\/IMG_8990.jpg?v=1779728797","url":"https:\/\/hnvintagepieces.com\/products\/serviced-rare-vintage-1950s-seiko-unique-nivaflex-15-jewels-u13050-seikosha","provider":"HN Vintage Pieces","version":"1.0","type":"link"}