Vintage 1967 JAPAN SEIKO BELL-MATIC WEEKDATER 4006-7010 27Jewels Automatic.

Vintage 1967 JAPAN SEIKO BELL-MATIC WEEKDATER 4006-7010 27Jewels Automatic.

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

Item description

Movement :

• Pet name : SEIKO BELL-MATIC WEEKDATER BUSINESS BELL .
• Caliber number : 4006A.
• Movement : Automatic.
• Beat rate : 19800bph.
• Year of manufacture start : 1967's.
• Factory : Suwa.

Externals :

• Serial number : 7N03531.
• Dial number : JAPAN 4006-7010T AD.
• Glass : Acrylic.
• Case size : About 38.6mm.
• Lug width : 19mm.
• Band : New Leather Strap.

Condition :

• Used, it runs well.
• Quick set(Day/Date) : Okay.
  Set of the days of the week : Iteration the hour hand at 10:00 and 1:00
  Set of the date: Press the button near the 3:00 position.
  Internal bezel Set : The set at one stage pulling the crown.
  Bell Set:Pull the button near the 3:00 position.
  Crown/pushers: Excellent Condition.
• 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 Dawn of Space-Age Complication Luxury (1967): In **1967**, a landmark historical year when Japan's domestic manufacturing pride reached full global maturity, the **Seiko Bell-Matic** reference **4006-7010** stood as an absolute pinnacle of mechanical complexity. Engineered by the **Suwa Seikosha** factory, it was Japan's premier automatic wrist instrument featuring a fully integrated mechanical alarm. Built explicitly for international jet-setters and top-tier executives, it served as an ultra-exclusive status symbol that perfectly captured the technological optimism of the late Showa industrial boom.

The Over-Engineered 27-Jewel Caliber 4006 Heart: This masterpiece is powered by the highly advanced **27-jewel Caliber 4006** automatic movement, operating at a classic frequency of **19,800 vibrations per hour (vph)**. While mass-market export models were heavily down-jeweled to satisfy international customs regulations, this **domestic market 27-jewel specification** represents the absolute elite tier of Seiko's alarm micro-engineering. Utilizing an exceptional count of synthetic rubies to secure the independent alarm springs, sounding hammers, and mainplate pivots, this engine rings with a beautifully crisp, mechanical metallic chime.

Architectural ""7010"" Classic Round Dress Case Geometry: Unlike later variations that adopted heavy cushion profiles, the reference **4006-7010** is globally celebrated among purist collectors for its elegant, traditional **round case geometry**. The solid stainless steel case features slender, beautifully tapered lugs and flawless mirror-polished surfaces that execute early **""Grammar of Design""** guidelines. It masterfully integrates a crisp **2 o'clock alarm activation push-button** and a recessed 4 o'clock time-setting crown, allowing the complicated structure to sit perfectly flush against the wrist.

Masterful ""Weekdater"" Dial Harmony and Inner Alarm Ring: The dial of the **4006-7010** is a study in clinical mid-century luxury, showcasing a radiant silver sunburst canvas. It works in perfect aesthetic unison with the **rotatable inner alarm bezel ring**, which features a bold indicator triangle to set the exact alarm time. Anchored by **hand-applied, multifaceted chunky block indices** and a dual-calendar aperture at 3 o'clock housing a bilingual day disk, the face ensures instant, split-second executive legibility under high-stakes corporate conditions.

A Sovereign Milestone of Suwa's Horological Heritage: Manufactured in the milestone year of **1967**, the 4006-7010 27-jewel variant stands as one of the ultimate ""holy grails"" for modern vintage Seiko purists worldwide. It represents the perfect historical intersection where rugged daily durability met timeless Japanese case finishing, useful weekdater utility, and high-grade internal micro-engineering right before the industry shifted toward the quartz revolution. Built to an uncompromising heirloom standard, it stands as a profound testament to an era when Japan perfected the luxury mechanical alarm instrument.

For more information, please look at the pictures.

Notes

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