Vintage 1964 JAPAN SEIKO SKYLINER CALENDAR J15019 21Jewels Hand-winding.

Welcome to my auction!
I am Japanese who live in Tokyo.

Item description

It's a SEIKO Hand-winding Watch, SKYLINER CALENDAR J15019 21Jewels .
It's in good used condition.
It's difficult to find this valuable watch in such a good condition. Highly recommended for SEIKO collectors!
Movement :
  • Pet name : SKYLINER CALENDAR .
  • Caliber number : 956.
  • Movement : Hand-winding.
  • Beat rate : 18000bph.
  • Year of manufacture start : 1963's.
  • Factory : Suwa.
Externals :
  • Serial number : 4118518.
  • Dial number : JAPAN SLNCJ15N368E AD.
  • Glass : Acrylic.
  • Case size : About 36mm.
  • Lug width : 19mm.
  • Band : New Leather Strap of SEIKO original.
Condition :
  • Used, it runs well.
  • Set the date: Iteration the hour hand at 9:00 and 12:00
  • The day difference time of an used watch is about +-1 minute / day.
  • For practical, everyday use, it would be advisable to have the movement cleaned and oiled.
Key Features
  • The Milestone of Olympic-Era Slimness (1964): In **1964**, the **Seiko Skyliner Calendar** arrived as the quintessential slim dress watch during a historic year marked by the Tokyo Olympics and Japan's triumphant re-entry into the global spotlight. The reference **J15019** was produced by the **Suwa Seikosha** factory during the absolute golden era of mid-century manual-wind timepieces. It was engineered to offer the rising post-war professional class a ""barely-there"" wrist presence, embodying the disciplined aesthetics, national pride, and quiet confidence of the high-growth 1960s Showa era.
  • The Trusted 21-Jewel Caliber 6222 (Ref. 15) Heart: This watch is powered by the **21-jewel Caliber 6222** (historically categorized in the 15-series line), a high-precision manual-wind movement operating at **18,000 vibrations per hour (vph)**. In **1964**, a **21-jewel count** for a hand-wound watch was a distinct mark of professional quality, deploying extra synthetic rubies to eliminate friction within the calendar gear train. This caliber is widely celebrated for its crisp, tactile winding feel, serving as a highly reliable and clinical daily instrument for decades.
  • Architectural ""J-Prefix"" Early Modernist Case: The reference **J15019** carries the prestigious **""J"" prefix**, signifying a landmark model from the dawn of Seiko's modern serial numbering system. The stainless steel case features elongated, razor-sharp lugs and an ultra-thin bezel that beautifully previews the foundations of the **""Grammar of Design.""** By prioritizing an **ultra-low-profile silhouette** that sits flush on the wrist, Suwa Seikosha created a highly ergonomic and elegant design that slipped effortlessly under the tailored cuff of a bespoke suit.
  • The Romance of the ""Skyliner"" Script Dial: The dial of the **J15019** is a masterclass in mid-century industrial clarity, featuring a radiant sunburst silver finish and **hand-applied, multifaceted baton indices**. With its sharp Dauphine hands and a framed calendar window at 3 o'clock, the layout prioritized instant legibility. The elegant, flowing **""Skyliner"" script logo** remains a highly coveted hallmark for vintage collectors, symbolizing an era that romanticized the dawn of global aviation and international business travel.
  • A Landmark of Suwa's Manual-Wind Heritage: Produced in the historic year of **1964**, the J15019 remains an essential, highly respected reference for purist collectors who value the **""Mechanical Slim"" lineage**. It represents the perfect intersection of **uncompromising micro-engineering and early Japanese minimalism**. It stands as a profound testament to an era when Suwa Seikosha perfected the **""high-utility executive dress watch,""** creating an indestructible and visually striking masterpiece that captures the pure spirit of 1960s craftsmanship.
    • For more information, please look at the pictures.
    Notes
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