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

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 : 5000775.
• Dial number : JAPAN 7625-8921R ED.
• Glass : Acrylic.
• Case size : About 36.4mm.
• Lug width : 18mm.
• Band : Wrist size that can be worn is Up to about 200mm.

Condition :

• Used, it runs well.
• Set of the days of the date: Iteration the hour hand at 9:00 and 12:00
• 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 dial shows some slight discoloration due to age-related deterioration.

Key Features

The Pioneer of Mid-60s Automatic Calendar Culture (1965): In **1965**—a landmark historical year when Japan's rapid economic rise set new standards for modern urban lifestyle—the **Seiko Sportsmatic Calendar 820** served as a definitive symbol of daily efficiency. Sourced from the legendary **Daini Seikosha (Kameido)** factory under reference **7625-8961**, this timepiece was engineered to deliver uncompromised automatic performance for the modernizing professional class. It represented a crucial technological step forward, transforming the wristwatch from a delicate dress ornament into a robust, high-utility lifestyle instrument.

The Indestructible 17-Jewel Caliber 7625 Magic Lever Heart: This watch is powered by the highly respected **17-jewel Caliber 7625A**, a robust automatic movement operating at a classic frequency of **18,000 vibrations per hour (vph)**. Famous for its ultra-simplified, highly durable architecture, this caliber leverages Seiko's revolutionary **""Magic Lever"" self-winding mechanism** to maximize winding efficiency with even the slightest wrist movement. By deploying a reliable **17-jewel specification**, Daini minimized mechanical wear, ensuring legendary longevity and easy long-term maintenance.

Symmetrical ""8961"" Case Geometry and Recessed 4 O'clock Crown: The reference **7625-8961** is universally celebrated among vintage purists for its elegant, perfectly balanced aesthetic proportions. The solid stainless steel case features **wide, clean lugs and a smooth polished bezel** that captures light with striking vintage warmth. Adhering to early automatic pride, it houses a **completely recessed crown flush with the case at 4 o'clock**, visually signaling to the user that manual winding was completely unnecessary due to the high efficiency of the internal rotor.

Distinguished Dial Character and Symmetrical Date Window: The dial of the **7625-8961** is a masterclass in mid-century layout harmony, featuring a beautiful silver sunburst canvas with an outer-rim index ring that visually expands the dial face. It showcases **hand-applied, multifaceted rectangular block indices** and razor-sharp dolphin hands that catch light with high-contrast legibility. Symmetrically balanced by a framed calendar aperture at 3 o'clock, the face is proudly completed by the vintage **""Calendar 820"" typography** and the Diashock protection signature at 12 o'clock.

The Sovereign Pride of the Engraved Dolphin Case Back: Manufactured in the milestone mechanical year of **1965**, the 7625-8961 remains a highly coveted, investment-grade cornerstone reference for serious vintage Seiko collectors worldwide. The ultimate hallmark of its historic sports-utility pedigree sits proudly on the screw-down case back: a **crisply detailed, etched Dolphin insignia**, which historically certified its rugged daily durability and water-resistant status. It stands as an eternal testament to an era when Japan perfected the luxury automatic daily instrument.

For more information, please look at the pictures.

Notes

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