Serviced Vintage 1969 JAPAN SEIKO 51 SEIKOMATIC-P 5106-7030 33J Automatic.

Serviced Vintage 1969 JAPAN SEIKO 51 SEIKOMATIC-P WEEKDATER 5106-7030 33Jewels Automatic.

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

Item description

Movement :

• Pet name : 51 SEIKOMATIC-P WEEKDATER .
• Caliber number : 5106A.
• Movement : Automatic.
• Beat rate : 19800bph.
• Year of manufacture start : 1967's.
• Factory : Kameido.

Externals :

• Serial number : 943270.
• Dial number : JAPAN 5106-7031R AD.
• Glass : Crystal.
• Case size : About 37.1mm.
• Lug width : 18mm.
• Band : Wrist size that can be worn is Up to about 198mm.

Condition :

• Used, it runs well.
• Quick set(Day/Date) : Okay.
  Set the day of the week : English only.
  Set the date: Iteration the hour hand at 8:00 to 12:00.
  Set of the date: Press the crown.
• The day difference time of an used watch is about +-1 minute / day.
• Overhaul service in September 2026.
  The movement has been cleaned and oiled, so it works fine.

Key Features

The High-Jewel Apex of the 51 Seikomatic-P Era (1969): Manufactured in **1969**—a landmark year during Seiko's golden mechanical age—the **Seiko 51 Seikomatic-P Weekdater** reference **5106-7030** represents Daini Seikosha's pinnacle achievement in high-jewel, multi-functional dress automatics. Positioned as an elite executive timepiece, the ""P"" designation signaled ""Presmatic"" innovation, blending cutting-edge calendar convenience with sophisticated movement engineering.

The Over-Engineered 33-Jewel Caliber 5106 Automatic Engine: Powering this historic watch is the remarkable **33-jewel Caliber 5106A**, operating at a smooth frequency of **19,800 vibrations per hour (vph)**. Outfitted with an extraordinary **33-jewel count** to minimize gear-train wear, this caliber introduced Daini's famed **hexagonal crown push-button quick-set mechanism** for instantaneous date changes, alongside **hacking seconds** and full manual-winding capability.

Architectural ""7030"" Sharp-Faceted Case Geometry: Sourced in a solid stainless steel case, the reference **5106-7030** exhibits razor-sharp Daini geometry executed strictly under Taro Tanaka's **""Grammar of Design""** guidelines. The case features sweeping, broad lugs, zero-distortion Zaratsu-polished planes, and an integrated recessed crown profile that sits flat and commanding on the wrist.

Masterful ""Weekdater"" Dial Layout and Premium Typography: The dial of the **5106-7030** displays clinical late-1960s visual harmony set against a radiant silver sunburst canvas with **hand-applied, multifaceted rectangular block indices**. It features a full dual-calendar display with an arched day window alongside the framed date aperture at 3 o'clock, proudly bearing the applied **""51""** badge, **""Seikomatic-P""** script, and **""33 JEWELS""** designation above 6 o'clock.

An Investment-Grade Milestone of Daini's Mechanical Heritage: Produced during the prime manufacturing year of **1969**, the 5106-7030 33-jewel Seikomatic-P Weekdater remains a highly sought-after, rare cornerstone reference for vintage Seiko purists. It stands as an eternal testament to Daini Seikosha's innovation, capturing the brief, glorious intersection of ultra-high jewel counts and innovative push-button calendar mechanisms.

For more information, please look at the pictures.

Notes

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