Seiko Goldfeather Diashock 25 Jewels – Ref. 605010 SS (August 1964)

This exceptional vintage Seiko comes from the renowned Goldfeather series , considered a technical masterpiece of Japanese watchmaking in the early 1960s. It has recently been serviced by a Japanese watchmaker and is in perfect working order. The dial shows signs of age and patina, which enhance the authentic vintage charm of this rare timepiece.

The rectangular stainless steel case bears the engraved inscription “Seiko Goldfeather” with the characteristic feather engraving on the back, as well as the markings 605010 SS and serial number 48xxxx , indicating production in August 1964 .

The newly fitted black leather strap perfectly complements the elegant case.

Technical data

• Hand-wound movement with 25 jewels (Diashock)
• Caliber: Seiko 60A (Goldfeather movement)
• Dimensions: 30 × 30 mm
• Lug-to-lug: 39.4 mm
• Height: 9 mm
• Lug width: 19 mm
• Weight (with strap): approx. 35 g

Historical background

The Seiko Goldfeather was introduced in 1960 and was the thinnest mechanical watch in Japan at the time of its launch. With a total height of only about 3 mm (movement), the model represented a milestone in the miniaturization of mechanical watch movements and impressively demonstrated the technical expertise of the Daini Seikosha manufacture.

Their goal was ambitious: Seiko wanted to demonstrate that an ultra-thin, precise, and robust movement could be manufactured even without the then-dominant Swiss technology. The newly developed Calibre 60A , equipped with 25 jewels and the Diashock shock protection system, combined exceptional accuracy with an extraordinarily slim profile.

The elegant, clean design with its rectangular case and minimalist indices embodied the stylistic shift of the early 1960s: from traditional round dress watches to modern, geometric forms. The Goldfeather is therefore considered not only a technical but also an aesthetic symbol of Japan's transition to modernity.

The Goldfeather series was a direct competitor to the Seiko Crown and served as its technical counterpart within the Seiko brand. While the Crown line gave rise to the first Grand Seiko , the Goldfeather represented Daini's vision of an extremely thin, elegant precision watch. Its innovative spirit contributed significantly to Seiko's international reputation in the 1960s.

Significance compared to Grand Seiko and King Seiko

While the Grand Seiko (developed by Suwa Seikosha ) was synonymous with the highest precision and chronometer accuracy, and the King Seiko (by Daini Seikosha ) embodied the claim of technical perfection and robustness, the Goldfeather represented a different, equally ambitious direction of development: the pursuit of extreme flatness, elegance and technical sophistication in miniature.

It demonstrated that Seiko mastered not only functional precision but also refined craftsmanship. In a way, it was Daini Seikoshi's antithesis to the Grand Seiko – not competing for ultimate accuracy, but demonstrating technical lightness and aesthetic reduction. The Goldfeather thus complemented the path Seiko embarked upon in the 1960s: the simultaneous perfection of precision, durability, and design artistry – values ​​that continue to define the brand's DNA today.

Condition and special features

The case of this watch is in very good condition, with sharp edges and polished surfaces. The dial shows a distinct patina but remains original and unaltered – an important aspect for collectors of vintage Seiko models. The movement runs precisely and reliably after being serviced by a Japanese watchmaker.

Warranty (used)
This is a used item. The limitation period for claims based on defects (statutory warranty) is 12 months from delivery.

Notice
As this is a pre-owned watch, water resistance cannot be guaranteed. To protect the movement, the watch should not come into contact with water or moisture.