Vintage 1971 JAPAN SEIKO SKYLINER 6100-8000 21Jewels Hand-winding.

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

Item description

It's a SEIKO Hand-winding Watch, SKYLINER 6100-8000 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 : 61 SKYLINER .
  • Caliber number : 61A.
  • Movement : Hand-winding.
  • Beat rate : 21600bph.
  • Year of manufacture start : 1968's.
  • Factory : Suwa.
Externals :
  • Serial number : 1D2475.
  • Dial number : JAPAN 6100-8000U.
  • Glass : Acrylic.
  • Case size : About 36.8mm.
  • Lug width : 18mm.
  • Band : New Leather Strap of SEIKO original.
Condition :
  • Used, it runs well.
  • 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 Standard of Early-70s Minimalist Dress Luxury (1971): In **1971**, during a historic year marked by rapid lifestyle diversification and peak mechanical maturation right before the full quartz transition, the **Seiko Skyliner** stood as the definitive choice for the modernizing executive. Carrying reference **6100-8000**, this refined dress instrument was manufactured by the **Suwa Seikosha** factory. Positioned as a sleek, highly reliable manual-wind alternative to thick automatics, it captured the disciplined, minimalist design philosophy that defined Japanese professional style during the Showa era.
  • The Proven 21-Jewel Caliber 6100 Slim Engine: This watch is powered by the magnificent **21-jewel Caliber 6100**, a highly regarded manual-wind engine operating at a classic frequency of **21,600 vibrations per hour (vph)**. Evolving from the legendary 62-series foundations, the 6100 caliber optimized the gear train layout to eliminate all calendar complications, preserving an exceptionally low profile and outstanding power delivery. The upscale **21-jewel specification** indicates a premium factory execution, deploying extra synthetic rubies to ensure an exceptionally smooth, tactile winding engagement and long-term daily stability.
  • Architectural ""8000"" Sharp Grammar of Design Case Mastery: The reference **6100-8000** is globally celebrated among vintage purists for its flawless implementation of Taro Tanaka's foundational **""Grammar of Design""** philosophy. The solid stainless steel case features an extraordinarily thin, flat bezel paired with long, muscular, and beautifully sharp straight lugs finished with zero-distortion mirror polishing. This low center-of-gravity architecture allows the mechanical structure to sit entirely flush against the skin, sliding completely weightless under a tailored corporate cuff.
  • Immaculate Non-Date Dial Purity and Clinical Symmetry: By completely omitting the constraints of a day or date calendar wheel, the dial of the **6100-8000** achieves a breathtaking level of **immaculate visual balance and serene symmetry**. The radiant silver sunburst canvas is decorated with **hand-applied, multifaceted elongated baton indices** and razor-sharp hands that catch light with beautiful vintage warmth. The clean typography and the proudly applied Suwa lightning bolt insignia at 6 o'clock remain proud badges of pure mid-century industrial pride.
  • A Sovereign Milestone of Suwa's Hand-Wound Legacy: Manufactured in the milestone year of **1971**, the 6100-8000 remains a highly coveted reference for purist collectors who value the uncompromised beauty of traditional manual mechanics. It represents the perfect historical intersection where rugged daily durability met timeless, sharp Japanese case finishing and pure mechanical micro-engineering. Built to an uncompromising heirloom standard, it stands as a profound testament to an era when Suwa perfected the luxury hand-wound daily business instrument.
    • For more information, please look at the pictures.
    Notes
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