Vintage 1969 JAPAN SEIKO BELL-MATIC WEEKDATER 4006-7010 27Jewels Automatic.

Vintage 1969 JAPAN SEIKO BELL-MATIC WEEKDATER 4006-7010 27Jewels Automatic.

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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 No. : 982728.
• Dial No. : JAPAN 4006-7010T AD.
• Glass : Acrylic.
• Case size : About 37.8mm.
• Lug width : 19mm.
• Band : New Leather Strap of SEIKO original.

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 Sovereign Peak of 1969 Mechanical Alarm Executive Luxury (1969): Manufactured in 1969—a historic watershed year in global horology marked by peak mechanical supremacy—the Seiko Bell-Matic Weekdater reference 4006-7010 represented Suwa Seikosha's premier complicated wrist instrument. Combining everyday dual-calendar functionality with a fully integrated mechanical alarm, this top-tier model stood as a tour de force of late-1960s Showa micro-engineering.
• The Over-Engineered 27-Jewel Caliber 4006A Automatic Engine: Powering this complex timepiece is the flagship 27-jewel Caliber 4006A, an in-house automatic engine operating at 18,000 vibrations per hour (vph). Boasting the highest jewel count produced across the entire Bell-Matic family, its lavish 27-jewel specification utilizes synthetic rubies across critical gear pivots to drastically reduce wear. The movement integrates smooth rotor winding, a quick-set date calendar, and a dedicated mainspring-driven internal hammer-and-gong mechanical chiming system.
• Dual-Crown Mechanical Alarm Architecture and Operation: Engineered for seamless executive utility, the 4006-7010 pairs its main winding crown with an independent alarm pusher at 2 o'clock. The wearer rotates the internal alarm-indicator bezel ring via the neutral crown position, charges the dedicated alarm spring through manual winding, and pulls the 2 o'clock pusher outward to arm the mechanical chime when the scheduled hour strikes.
• Architectural ""7010"" Grammar of Design Case Geometry: Executed in a solid stainless steel case, the reference 7010 features bold angular contours, broad sweeping lugs, and zero-distortion mirror-polished Zaratsu planes inspired by Taro Tanaka's ""Grammar of Design"" principles. Encircling the dial is an internal rotatable alarm bezel that frames hand-applied, multifaceted rectangular block indices, crisp hands, and a framed day-date calendar display at 3 o'clock.
• An Investment-Grade Masterpiece of Suwa's High-Jewel Complications: Produced during the pinnacle mechanical year of 1969, the 4006-7010 27-jewel Bell-Matic Weekdater remains an exceptionally coveted, museum-worthy reference among vintage Seiko collectors worldwide. Representing the rarest, most lavishly appointed early iteration of Seiko's iconic mechanical alarm lineup, it stands as an enduring heirloom of Japanese horological history.

For more information, please look at the pictures.

Notes

• Before buying.
  The vintage watches we sell are inspected and adjusted so they work fine. However, since it is an vintage watch, Please purchase on the assumption that it will be repaired.
  
  
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