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Seikomatic Weekdater - 1963


+ $109 shipping to United States of America


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More information
Condition Pre-owned
Scope of delivery No original box, no original papers
Availability Available now
Expected delivery Oct 30, 2019 - Nov 11, 2019
Payment Method
  • Bank transfer

Reviews: 33
This dealer is from Waltham St Lawrence, United Kingdom.
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Basic Info

Listing number 6IDMQ0
Reference number J13080
Brand Seiko
Movement Automatic
Case material Steel
Bracelet material Leather
Year 1963
Condition Very good (Worn with little to no signs of wear)
Scope of delivery No original box, no original papers
Gender Men's watch/Unisex
Location United Kingdom, Waltham St Lawrence


Movement Automatic
Movement/Caliber Seikosha
Base caliber 400
Number of jewels 33


Case material Steel
Case diameter 37 x 43 mm
Thickness 12 mm
Water resistance 3 ATM
Bezel material Steel
Glass Plexiglass
Dial Silver
Dial numerals No numerals


Bracelet material Leather
Bracelet color Black
Bracelet length 190 mm (115 mm / 75 mm)
Bracelet thickness 3 mm
Lug width 19 mm Size guide
Clasp Buckle
Clasp material Steel
Buckle width 16 mm


Date, Weekday


Center Seconds, Quick Set


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 highpoint 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 60’s. 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 watch's 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 Baton 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 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.

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

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The Chrono Duo Ltd

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Tel.: 07977923822
Mobile: +44 (0)7977 923822
We speak:
  • English
Trusted Seller since 2017
21 watches listed
Number of watches sold via Trusted Checkout: 41

4.9 out of 5 stars  |  Reviews: 33

Detailed explanation of ratings 

 4.9 Shipping
 4.8 Item description
 5.0 Communication
of buyers would recommend this dealer.

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Size guide for wristbands

1 | Lug width

The lug width is the width of the strap at the end that is attached to the watch. This is the interior distance between the two lugs (horn-like protrusions) on the watch casing. The strap will fit your watch only if the lug width of the watch is the same width as the strap.

2 | Buckle width

The buckle width is the width of the strap at the buckle end. If you want to keep your watch’s original buckle and replace only the strap, the width of the original buckle must be identical to the strap width. For watches with folding clasps, please choose a strap specially made for your particular clasp.

3 | Strap length

The strap length is the combined length of the short strap side 3A (without buckle) and the long strap side 3B. For metal straps, the length of the strap including the clasp is measured in the closed position.

4 | Strap thickness

Strap thickness is the height of the strap. Many leather straps thin out towards the buckle end, or “taper”. If you want to keep your watch’s original buckle and replace only the strap, the strap thickness must match the height of the original buckle. For watches with folding clasps, please choose a strap specially made for your particular clasp.