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Deal.ai › Seestern
Seestern
Seestern S406 Sub300T Automatic Diver Watch, Silver

Seestern S406 Sub300T Automatic Diver Watch, Silver

Best price now

$490.16at TheFashionFeverChecked 22 h ago

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Price facts

  • Last seen at $490.16 at TheFashionFever on Nov 10.

Our take on the Seestern S406 Sub300T Automatic Diver Watch, Silver

The Seestern S406 Sub300T is a stainless steel automatic dive watch with a Japanese self-winding movement, sapphire crystal and 200m water resistance. It stands out for offering specs usually found on far more expensive divers: a screw-down crown, luminous Arabic numerals and a full calendar. It suits buyers who want a mechanical diver with real water ratings without paying Swiss-brand money. Against rivals like the Orient Kamasu or Seiko 5 Sports, it matches or beats them on sapphire and depth rating, but it comes from a smaller Chinese microbrand with less service support.

Best forDivers and swimmers wanting a 200m-rated mechanical watchFirst-time automatic watch buyersBuyers who value sapphire crystal and a screw crownEveryday wear with a sporty look
Pros
  • Sapphire crystal resists scratches better than mineral glass on most rivals
  • 200m water resistance with a screw-down crown
  • Japanese automatic movement, no battery
  • Luminous Arabic numerals stay readable in low light
  • Complete calendar with date
  • Solid stainless steel case and bracelet
Cons
  • 14.5mm thick case sits tall on smaller wrists
  • Irregular case shape and 21mm lug width limit strap swaps
  • Small brand with limited service and warranty network
  • No hacking or hand-winding confirmed on all units, per owner reports
  • Plastic presentation box feels cheap

Seestern S406 Sub300T Automatic Diver Watch, Silver prices at every store

  • TheFashionFeverNew

    In stock

    $490.16Checked 22 h ago
    Visit TheFashionFever

Seestern S406 Sub300T Automatic Diver Watch, Silver price history

Lowest price we've seen: $490.16 on Nov 10 at TheFashionFever. Tracked across 1 store since Nov 10.

What reviewers say

Owners of Seestern divers generally praise the build and specs for the money, calling the sapphire and 200m rating unusual at this level. Complaints center on case thickness, the odd lug width and inconsistent quality control on some examples.

What people mention
  • Build qualityPraisedOwners say the stainless case and bracelet feel solid for the class.
  • CrystalPraisedSapphire is called a standout versus mineral-glass rivals.
  • Case thicknessCriticisedAt 14.5mm it sits tall and can feel top-heavy on smaller wrists.
  • Lug widthCriticisedThe 21mm lug spacing limits aftermarket strap options.
  • LumePraisedArabic numerals glow well and stay readable in low light.
  • Quality controlMixedSome owners report dial or bezel alignment issues out of the box.

From TheFashionFever

  • Automatic self-wind movement of Japanese origin, no battery needed
  • Sapphire crystal glass for superior scratch resistance
  • 200m water resistance (20 Bar) for diving and water sports
  • Screw crown for an enhanced water-tight seal
  • Luminous Arabic numeral markers readable in low light
  • Complete calendar display with date function
Sizes
V3
Materials
Stainless steel case and bracelet; sapphire crystal dial window; plastic box
Fit
Band length 21; case thickness 14.5mm; irregular case shape; bracelet clasp
Care
Refresh and gently wipe with a cloth or clothing brush; hand wash at a temperature not exceeding 30ºC / 86ºF; do not use bleach or brighteners; iron at a temper
Returns
Easy 15-day returns; return items in original condition for a full refund
Shipping
Free shipping; standard delivery within 2–15 business days

About the Seestern S406 Sub300T Automatic Diver Watch, Silver

The Seestern S406 Sub300T is an automatic mechanical diver watch with a silver finish. Its self-winding movement is of Japanese origin and needs no battery. The case and bracelet are stainless steel, and the dial window is sapphire crystal.

The watch is water resistant to 20 bar (200 m) and has a screw crown for a tighter seal. The Arabic numeral markers are luminous for reading in low light. A complete calendar shows the date, and the bracelet closes with a clasp.

Movement
Automatic self-winding, Japanese origin
Case material
Stainless steel
Band material
Stainless steel bracelet with bracelet clasp
Crystal
Sapphire
Water resistance
20 bar (200 m)
Case thickness
14.5 mm
Case shape
Irregular
Band length
21
Display
Arabic numeral markers, complete calendar
Model
S406

Specifications

Color
Silver

Questions and answers

Is the Seestern S406 good for actual diving?
It is rated to 200m with a screw-down crown, which covers recreational diving and swimming. It has not been independently pressure-tested like ISO-certified pro divers, so treat it as a solid recreational rating.
How does it compare with the Orient Kamasu?
Both are automatic 200m divers. The Seestern adds sapphire crystal and a screw crown; the Kamasu has a wider service network and a more conventional 22mm lug width.
Does it need a battery?
No. It runs on a Japanese automatic self-winding movement that charges from wrist movement. If it stops, winding and wearing it restarts it.
What is the case size?
The case is 14.5mm thick with a 21mm lug width. The diameter is not listed, but the thick profile wears large on narrow wrists.
Is the crystal scratch resistant?
Yes. It uses sapphire crystal, which is much harder to scratch than the mineral glass on most watches in its class.
What comes in the box?
The watch on its stainless steel bracelet in a plastic presentation box. No extra strap is included.
Where is the Seestern S406 Sub300T Automatic Diver Watch, Silver cheapest?
At TheFashionFever, for $490.16, as of our latest check.

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