Vintage 1999 JAPAN SEIKO DIVER'S 10BAR 7S26-0020 21Jewels Automatic.

Vintage 1999 JAPAN SEIKO DIVER'S 10BAR 7S26-0020 21Jewels Automatic.

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

Item description

Movement :

• Pet name : DIVER'S 10BAR.
• Caliber No. : 7S26A.
• Movement : Automatic.
• Beat rate : 21600bph.
• Year of manufacture start : 1996's.
• Factory : Kameido.

Externals :

• Serial No. : 911218.
• Dial No. : JAPAN 7S26-002R R 2.
• Glass : Crystal.
• Case size : About 43mm.
• Lug width : 22mm.
• Band : Wrist size that can be worn is Up to about 215mm.

Condition :

• Used, it runs well.
• Approximate width of the bezel : 40mm. Bezel operation: good.
• 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 Modern Icon of ISO Standards (1999): In **1999**, the **Seiko Diver's 10BAR** represented the ultimate fusion of professional utility and everyday durability. The reference **7s26-0020** was produced during an era when Seiko was solidifying its global reputation for producing ""indestructible"" dive watches. It arrived as the spiritual successor to the legendary 6309 and 7002 series, serving as the definitive entry point for explorers, military personnel, and watch enthusiasts at the turn of the millennium.

The Legendary Caliber 7S26 Workhorse: This watch is powered by the **21-jewel Caliber 7S26**, an automatic movement operating at **21,600 vibrations per hour (vph)**. In **1969**, the 7S26 was introduced as the backbone of Seiko's modern mechanical lineup, celebrated for its ""Magic Lever"" winding system and its ability to run for decades without service. It was engineered with a focus on shock resistance and torque, prioritizing reliable performance over delicate complications in the most demanding environments.

Architectural ""0020"" Diver Case Geometry: The reference **7S26-0020** features the iconic ""cushion-style"" evolution of the diver case, characterized by its flowing curves and polished flanks. A defining trait is the **screw-down crown recessed at the 4 o'clock position**, which protects the stem from impact and ensures maximum wrist comfort. In **1999**, this case design was praised for its ergonomic balance, offering a substantial 42mm presence that felt remarkably compact on the wrist.

Functional ""10BAR"" Legibility and Bezel: The dial of the **7S26-0020** is a study in clinical legibility, featuring **bold, Lumibrite-filled hour markers** and broad ""arrow"" hands. The 120-click unidirectional rotating bezel provided a vital safety tool for timing elapsed minutes. In **1999**, the high-contrast dial and the distinct ""Diver's 10BAR"" (or 200m) text signaled that this was not merely a fashion accessory, but a certified tool for underwater navigation.

A Landmark of Global Watch Culture: Produced in **1999**, the 7S26-0020 remains one of the most culturally significant references in Seiko's history. It represents the era when Seiko perfected the **""Affordable Diver,""** creating a mechanical legend that outlasted its more expensive rivals. It stands as a testament to the factory's commitment to industrial excellence, remaining a foundational piece for collectors and a symbol of the enduring spirit of Japanese adventure.

For more information, please look at the pictures.

Notes

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