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

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 : 960407.
• Dial number : JAPAN 5106-7031R AD.
• Glass : Crystal.
• Case size : About 37.5mm.
• Lug width : 18mm.
• Band : Wrist size that can be worn is Up to about 180mm.

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.
• For practical, everyday use, it would be advisable to have the movement cleaned and oiled.

Key Features

The Sovereign Peak of 1969 Kameido Automatic Mastery (1969): Manufactured in **1969**—a landmark year in Japanese horological history marked by peak mechanical refinement—the **Seiko 51 Seikomatic-P (Presmatic)** represented Daini Seikosha's ultimate executive automatic series. Sourced under reference **5106-7030**, this flagship luxury model sat at the very top of Kameido's line, offering superior mechanical finishing and advanced daily calendar utility right before the mechanical transition era.

The Over-Engineered 33-Jewel Caliber 5106 Automatic Heart: Powering this historic timepiece is the legendary **33-jewel Caliber 5106A**, an in-house automatic engine operating at a frequency of **19,800 vibrations per hour (vph)**. Equipping a daily watch in **1969** with a lavish **33-jewel specification** was a supreme statement of luxury engineering. Designed to drastically reduce pivot wear across the gear train, it features **hacking seconds**, manual-winding capability, and high-precision rate stability.

Revolutionary Crown Push-Button Quick-Set Date Mechanism: A defining technical innovation of the 51 Seikomatic-P series was its unique **hexagonally shaped crown with an integrated center push-button**. By pressing the spring-loaded center button inside the crown, the wearer could advance the date calendar instantly with sharp, precise feedback—eliminating the need for secondary case pushers and preserving sleek, clean case lines.

Architectural ""7030"" Case Geometry and Mid-Century Facets: The reference **5106-7030** is distinguished among vintage Seiko collectors for its strong, geometric case silhouette. Executed in solid stainless steel, the case features crisp, multifaceted angles and broad polished bevels inspired by Taro Tanaka's **""Grammar of Design""** principles, engineered to sit comfortably flat and flush against the wrist.

Masterful ""Weekdater"" Dial Harmony and Dual-Calendar Display: The dial of the **5106-7030** exhibits exceptional visual balance, showcasing a radiant silver sunburst canvas decorated with **hand-applied, multifaceted rectangular hour indices** and razor-sharp hands. Symmetrically positioned at 3 o'clock, the dual-calendar window features a **bilingual day disk** alongside the quick-set date wheel, proudly bearing **""SEIKOMATIC-P""** and **""33 JEWELS""** typography alongside the Daini lightning bolt emblem above 6 o'clock.

For more information, please look at the pictures.

Notes

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