Serviced Vintage 1965 JAPAN SEIKO SPORTSMATIC CALENDAR 7625-8961 17J Automatic.

Serviced Vintage 1965 JAPAN SEIKO SPORTSMATIC CALENDAR 820 7625-8961 17Jewels Automatic.

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

Item description

Movement :

• Pet name : SPORTSMATIC CALENDAR 820 .
• Caliber number : 7625A,C,D,E.
• Movement : Automatic.
• Beat rate : 18000bph.
• Year of manufacture start : 1964's.
• Factory : Kameido.

Externals :

• Serial number : 5502034.
• Dial number : JAPAN 7625-8911S ED.
• Glass : Acrylic.
• Case size : About 36.55mm.
• Lug width : 18mm.
• 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
• The day difference time of an used watch is about +-1 minute / day.
• Overhaul service in August 2025.
  The movement has been cleaned and oiled, so it works fine.
• There is a crack in the back cover. It has been lightly welded from the inside, but it is not completely waterproof, so please use it with care.

Key Features

The Sportsmatic Line: The **Seiko Sportsmatic** series was a hugely popular and robust line of automatic watches launched in the early 1960s. It was designed to offer reliable self-winding movements to the mass market, building upon the foundations laid by earlier automatic models.

The 7625 Caliber: The watch is powered by the **Seiko Caliber 7625**, a widely used 17-jewel automatic movement known for its simplicity and durability. This movement operated at **18,000 vibrations per hour (vph)** and included a date complication.

The ""Calendar 820"" Designation: The ""Calendar 820"" designation often referred to the specific design or case code within the Sportsmatic series, indicating a model variant with a date function. The reference **7625-8961** adheres to the classic, clean, and practical mid-1960s aesthetic.

Semi-Quickset Date: The 7625 caliber typically featured a **semi-quickset date** function, where the date could be advanced by moving the hands back and forth between roughly 9 PM and 1 AM. This was a common method before the advent of full quickset systems.

Historical Context (1965): The production year **1965** places this watch at the peak of the Sportsmatic line's popularity, right before the global dominance of the *Seiko 5* series. It represents Seiko's excellence in high-volume production of reliable, high-value automatic watches.

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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