Project Description

Seiko Seikomatic Weekdater J13080 £695

At the time of its introduction in 1963, the Seikomatic Weekdater J13080 was the flagship of the Seiko Automatic line up. In effect, the Weekdater was Seiko’s equivalent to the Grand Seiko, before the appearance of the first automatic GS in 1967. A high point in Seiko’s illustrious history – Absolutely!

Seiko’s “Weekdater” line up offers some of the cleanest layouts and most appealing designs to come out of the ’60s. A style that captures modernity and minimalism perfectly; and that’s just as relevant today, as it were when they were introduced more than 56 years ago.

Our Seikomatic Weekdater J13080 was produced in July 1963, making it an early example. Early versions are easily identifiable by their “J” style reference numbers and three-digit movement numbers; in this watches case, a Cal. 400.

The virtually unmarked Silver “Sunburst” dial sports the applied “Seikomatic” spinning top logo, and just above the six o’clock marker the AD “Star” insignia which denotes an appliqué dial. In this case, a dial with applied mirror-finish Batton style 5-minute markers in polished and bevelled steel. These are set off perfectly by the date aperture at 3 o’clock and the day window at 6 o’clock; both being inset with polished surrounds.

The dauphine hands also boast a mirror finish and are a perfect pairing to the detailed applied markers. These too are in beautiful condition.

The polished Stainless-Steel case is a classic understatement personified.  The first thing you notice is, the case is perfectly round, there is no crown visible.  This is inset flush with the edge of the case at 4 o’clock, giving purity to the overall design.  The one extravagance? The bevelled lugs sit at just the right angle to the 37mm case. It’s the little touches that make all the difference in design.

The push-on domed case back is almost worn smooth with age and sports millions of little scratches from where it has been set down over the years.  So much so, that the engraving on the case back, has all but disappeared.  However, using a 10X loop, the engraving reads “Seiko: Waterproof 30: Stainless Steel: J13080.  If I had an electron microscope, it would have been easier!

Finally, we have changed the metal strap (it is very small, but will come with the watch) for a black, Crocodile grain, Italian leather strap completing and complimenting this design classic of flawless understatement.

Without a doubt, it is just as relevant today as it was more than a half-century ago.

We work hard to ensure you are pleased with your purchase, both before and after the sale. Contact us to request any additional information.

Dispatch: We aim to dispatch items within 1-2 days of receipt of payment.

The delivery method can vary depending on the value of the watch. All watches are sent fully insured usually using UPS.

All watches sold without an original box will still be dispatched with a ChronoDuo presentation box.

Warranty: All timepieces purchased from us come with a guarantee of authenticity and our 12-month time-keeping warranty. Please note that accidental damage or damage to the item resulting from third-party repairs, improper handling, or liquid damage will void our warranty. We do not guarantee any of our watches to be waterproof.


  • Reference:  Seikomatic J13080

    Case Material:  Stainless Steel

    Case Width:  37mm

    Lug to Lug:  43mm

    Lug width: 19mm

    Thickness:  12mm

    Weight: 50g

    Crystal:  Acrylic

    Dial:  Silver Sunburst dial

    Hands:  Polished Silver

    Crown:  Original

    Movement:  Cal. 400 Seikosha Automatic

    Case Back:  Stainless Steel, Ref. Numbers: “3714548”

    Bracelet:  New black leather

    Additional Features:  

    Small Stainless Steel Bracelet supplied too

    Chrono Duo Presentation Box

    No Original Box or Papers