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6309-8230 · SK-005

Seiko 5 Automatic Blue

€119≈ $129Sold
Made
1970s–80s
Condition
B · Very good
Dial
Original
Movement
6309A automatic
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About this watch

Seiko 5 Automatic Blue, reference 6309-8230, with the 6309A automatic movement (21 jewels), made in 1970s–80s. Blue gradient sunburst dial with applied baton markers, day-date window with Spanish day wheel. Comes on a stainless steel bracelet (aftermarket). The dial is the original factory dial. Condition grade B – Very good: light, honest wear for its age.

Specifications

Reference6309-8230
Dial code6309-829L T
Movement6309A automatic, 21 jewels
Production date1970s–80s
DialBlue gradient sunburst, applied baton markers
Day wheelSpanish
CaseRound stainless steel
Condition gradeB what this means
Case, hands, movementOriginal Seiko Seiko
Dial originalityOriginal factory dial Original how we check
Bracelet / strapStainless steel bracelet Aftermarket
IncludedWatch only
About this model

The Seiko 6309-8230

The Seiko 6309-8230 is a Seiko 5 automatic (6309 family, export). It runs on Seiko's calibre 6309, an automatic movement with 17 or 21 jewels, beating 21,600 times an hour. It can't be wound with the crown and winds itself as you wear it, and the seconds hand keeps running while you set the time. Seiko made the 6309 from about 1976 to 1990. Seiko 5s in round, cushion and square cases with colourful sunburst dials. The 6309-7040 Turtle diver uses the same movement.

Is it original? The small dial code at 6 o'clock should start with 6309, like the caseback. If it starts with another number, the dial was made for a different model (a replacement dial). We have seen this reference with dial codes 6309-829L T, 7009-6210 R1.

What is it worth? A running 6309-8230 in average condition usually sells for about €60–130 in Europe; an original dial, a strong colour and the original bracelet push it up. Price guide

Everything about the Seiko 6309-8230 →

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Movements

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How to

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Buying guide

Vintage Seiko buying guide: 10 checks before you buy

How to buy a vintage Seiko without regrets: caseback and dial codes, redials and replacement dials, movement, crystal, bracelet, serial dates and fair prices. The checks we use on every watch.