SEIKO 6309-7290 review

Seiko 6309-7290 Review - A Dive Watch That Shines

seiko 6309 7290

Seiko and dive watches are often muttered in the same sentence for very good reasons. The team at Seiko have been making them for decades and have some classics up their sleeves like the SKX range and the Turtle (if you are not familiar with Seiko, their watches have a lot of nicknames).

This particular model, the Seiko 6309 7290 is no longer in production, being made from 1976-1988. It is actually a rather unique variation of the famous Turtle, albeit a rather slim variation. 

It also has some overlaps to the SKX range with a similar bezel typeface and markings, and a protected crown at the unusual 4 o’clock position. But that is where it ends.

The Style & Features

The 6309-7290 has a very clean design which is typical of Seiko. The face is a plain black, matching the bezel.

The markers are large and well-lumed, which is another thing Seiko loves to do with their dive watches. So, this baby will shine well in the dark, even if you are not diving with it.

Another typical Seiko dive feature is the offset crown at 4 o’clock which is designed to be less obtrusive which is handy for those use the watch for practical purposes. It’s also surrounded by a high flange to help stop it from being hit accidentally.

The 6309 designation is for a Seiko automatic movement with 17 jewels and 47 hours of power reserve. It beats at 21,600 bph. So, you should be good to go with 2 days not using this watch. It also features a day/date function which is a nice addition to an automatic watch at this price point.

In terms of waterproofness, it is not a certified dive watch but 150m should be enough to take swimming, snorkelling or perhaps low-depth diving. Of course, it depends on the band you have on it at the time, as I would not normally dive with a leather band.

The watch pictured here is an all black watch, but Seiko produced a number of variations include the ever-popular “Pepsi” red and blue bezel, as well an orange dial version.

Technically, the model number was 729A for the Pepsi/blue & red bezel and the orange face (quite rare) was 729B.

seiko 6309 7290

Seiko 6309-7290

seiko 6309-729A

Seiko 6309-729A

5 thoughts on “Seiko 6309-7290 Review – A Classic Diver From The 80s”

    1. So many wrong info in here. Slim cases started in the 80s, not 70s. The 6309 slim ended in 1988 and was replaced by the 7002 divers, date only. Also, the 2 pictures you posted are both aftermarket examples of the 729A and 7290.

      I’m sure it is with good intent that this article was written but please make sure to have the correct info. Cheers

      1. I would also like to add that the one with the pepsi bezel pictured above only has a date complication, therefore i believe that is a 7002 model.

      2. So okay I have one of these actually I have three of these watches that are being discussed that have accumulated if you were looking to restore them to change the face and put on a face that actually still has functioning Loom to replace the chapter Rings the bezels Etc to mod the man update them who would you go to? Who would you trust to do this work? And where would you look to find the parts that you need?

  1. @ daniel peabody

    I had a 6309 serviced with new bezel insert & sapphire crystal. A 7002 I own was modded – as my son wore it or manual work and scratched up the bezel so I upgraded the crystal to sapphire at the same time.

    I used –

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