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

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

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

Item description

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 : 1D1785.
• Dial number : JAPAN 61-8000T.
• Glass : Acrylic.
• Case size : About 36.8mm.
• Lug width : 18mm.
• Band : New Leather Strap.

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 Sovereign Benchmark of 1971 Slim Manual-Wind Luxury (1971): Manufactured in **1971**—a monumental historic year during Japan's mid-Showa industrial boom—the **Seiko Skyliner** reference **6100-8000** represented Suwa Seikosha's definitive answer for an ultra-slim, non-date manual-wind dress watch. Positioned as an elegant alternative to heavy automatic models, the Skyliner line offered refined, minimalist sophistication for corporate executives during the peak era of mechanical Japanese watchmaking.

The Over-Engineered 21-Jewel Caliber 6100 Manual Heart: Powering this historic timepiece is the revered **21-jewel Caliber 6100A**, an in-house manual-wind engine operating at a smooth frequency of **21,600 vibrations per hour (vph)**. Celebrated by vintage purists for its robust construction and ultra-thin profile, this caliber deploys a lavish **21-jewel specification** across its gear-train pivots to minimize mechanical wear, equipped with Seiko's proprietary **Diashock** shock-protection system for long-term rate stability.

Architectural ""8000"" Grammar of Design Case Geometry: The reference **6100-8000** is globally distinguished among collectors for its strict adherence to Taro Tanaka's **""Grammar of Design""** philosophy. Executed in solid stainless steel, the case features flat, zero-distortion mirror-polished Zaratsu planes, sharp-angled lug facets, and a sleek, low-profile bezel. This slim architectural geometry allows the mechanical instrument to rest completely flush against the wrist, sliding weightlessly under a tailored cuff.

Immaculate Non-Date Dial Symmetry and Fine Cursive Typography: The dial of the **6100-8000** is a masterclass in early-1970s visual restraint. Free from calendar aperture clutter, the brilliant silver sunburst canvas showcases **hand-applied, multifaceted rectangular block indices** with a prominent double index at 12 o'clock and razor-sharp dauphine hands. The lower dial is gracefully adorned with the iconic stylized **""Skyliner""** cursive typography and the Suwa Seikosha factory crest above 6 o'clock.

An Investment-Grade Masterpiece of Suwa's Manual Legacy: Produced during the milestone mechanical year of **1971**, the 6100-8000 21-jewel Seiko Skyliner remains an uncommonly clean, highly sought-after cornerstone reference for serious vintage Seiko purists. Capturing the precise historical moment where Suwa Seikosha perfected high-utility manual-wind dress watches before the global shift into quartz technology, it stands as an eternal, heirloom-quality piece of Japanese horological history.

For more information, please look at the pictures.

Notes

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