Vintage 2003 JAPAN SEIKO DIVER'S 10BAR 7S26-0040 21Jewels Automatic.

Vintage 2003 JAPAN SEIKO DIVER'S 10BAR 7S26-0040 21Jewels Automatic.

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

Item description

Movement :

• Pet name : DIVER'S 10BAR.
• Caliber number : 7S26A.
• Movement : Automatic.
• Beat rate : 21600bph.
• Year of manufacture start : 1996's.
• Factory : Kameido.

Externals :

• Serial number : 391144.
• Dial number : JAPAN 7S26-0044 R 2.
• Glass : Crystal.
• Case size : About 42mm.
• Lug width : 23mm.
• Band : Wrist size that can be worn is Up to about 195mm.

Condition :

• Used, it runs well.
• Approximate width of the bezel : 40mm. Bezel operation: good.
  Quick set(Day/Date) : Okay.
  Set the day of the week can be in English or Spanish.
  Set of the date : The set at one stage pulling 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.
• The bezel is a little loose when turning.

Key Features

The Modern Classic ""Sub-Mariner"" Era (2003): In **2003**, the **Seiko 10BAR Diver** (often referred to as the **SKX031**) represented the perfect balance between professional tool-watch aesthetics and everyday versatility. Produced during a time when Seiko was solidifying its reputation for bulletproof reliability, the reference **7S26-0040** arrived as a refined, slightly smaller alternative to the ""Monster"" or ""SKX007"" models. It offered a sophisticated ""Sub-Diver"" silhouette that complemented both casual weekend wear and a professional office environment.

The Legendary 7S26 ""Workhorse"" Movement: This watch is powered by the **21-jewel Caliber 7S26**, a robust automatic movement operating at **21,600 vibrations per hour (vph)**. By **2003**, the 7S26 had become the backbone of Seiko's entry-level mechanical lineup, famous for its **""Magic Lever""** winding system and its ability to run for decades without a service. It is a pure mechanical engine designed for durability; while it lacks manual winding and hacking, it is celebrated for its incredible winding efficiency and legendary resilience.

Architectural ""0040"" Mid-Size Proportions: The reference **7S26-0040** is highly prized for its comfortable **39mm-40mm case size**. In **2003**, this was considered the ""sweet spot"" for ergonomics. The case features a **screw-down crown and a bi-directional rotating bezel**, allowing for precise tracking of elapsed time. Unlike the bulkier professional divers, this 10BAR model was engineered to be thinner and more balanced, ensuring it sat perfectly flush against the wrist for all-day comfort.

Masterful ""LumiBrite"" Dial Harmony: The dial of the **7S26-0040** is a study in high-contrast legibility, featuring deep matte black finishing and **applied, polished indices filled with Seiko’s proprietary LumiBrite**. In **2003**, this luminescence provided world-class brightness in low-light conditions. The classic Mercedes or ""sword"" style hands and the framed day-date window at 3 o'clock provide a timeless, professional aesthetic that bridges the gap between vintage heritage and modern utility.

A Landmark of the Neo-Vintage Legacy: Produced in **2003**, the 7S26-0040 has ascended to ""Cult Status"" among collectors today. It represents an era when Seiko perfected the **""accessible diver""**, creating a watch that was as functionally honest as it was visually iconic. As the precursor to many of today's reimagined divers, it stands as a testament to Seiko's ability to build a reliable, stylish, and high-quality automatic instrument that remains a ""Must-Have"" for the modern mechanical enthusiast.

For more information, please look at the pictures.

Notes

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