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Sea Auto 30 [42mm]

Sea Auto 30 [42mm]

5(5 ratings)

Best price now

$9,955.49at MontredoChecked 34 min ago

21% under what the other stores charge

Compared across 12 stores. Prices are checked against each store and labelled with when.

Visit Montredo

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Price facts

  • Lowest price today: $9,955.49 at Montredo (checked Nov 13, 2026).
  • Checked at 12 stores.

Our take on the Sea Auto 30 [42mm]

The Sea Auto 30 is a 42mm automatic dive watch that updates the quartz Sea Quartz 30 made famous on Magnum P.I. It runs a Miyota 9015 high-beat movement with a 42-hour power reserve, a smooth sweeping seconds hand and a slim case profile. A solid sapphire crystal, a unidirectional glass bezel, Super-LumiNova lume and 300m water resistance with a screw-down crown and caseback make it a genuine dive-capable watch. It suits buyers who want vintage diver looks with mechanical internals; against quartz rivals it trades battery-free convenience for winding and service, and against premium Swiss divers it gives similar specs at a lower tier of finishing.

Best forFans of vintage-style dive watchesBuyers wanting a mechanical movement in a slim caseEveryday wear with real 300m water resistanceMagnum P.I. and retro diver enthusiasts
Pros
  • Miyota 9015 is slim, high-beat and proven reliable
  • 42-hour power reserve
  • 300m water resistance with screw-down crown and caseback
  • Solid sapphire crystal set below the bezel rim
  • Super-LumiNova lume for low-light legibility
  • Engraved orca caseback adds character
Cons
  • Glass bezel insert is less scratch-resistant than ceramic
  • Automatic movement needs winding and eventual servicing
  • 42mm case may wear large on smaller wrists
  • No date or other complications mentioned

Sea Auto 30 [42mm] prices at every store

  • Chrono24.comPre-owned

    In stock

    $8,498.00+ $64.00 shippingChecked 34 min ago
    Visit Chrono24.com
  • MontredoNew

    In stock

    $9,955.49+ $33.19 shippingChecked 34 min ago
    Visit Montredo
  • Luxury Watches USANew

    In stock

    $9,991.00Free shippingChecked 34 min ago
    Visit Luxury Watches USA
  • eBayNew

    In stock

    $11,330.00Free shippingChecked 34 min ago
    Visit eBay
  • Swiss Watches DirectNew

    In stockShips from the UK · duties may apply

    $11,392.00+ $123.00 shippingChecked 34 min ago
    Visit Swiss Watches Direct
  • E.D. Marshall JewelersNew

    In stock

    $12,300.00Free shippingChecked 34 min ago
    Visit E.D. Marshall Jewelers
  • Diamond Source NYCNew

    In stock

    $14,510.00Free shippingChecked 34 min ago
    Visit Diamond Source NYC
  • Marc Robinson JewelersNew

    In stock

    $19,305.00Free shippingChecked 34 min ago
    Visit Marc Robinson Jewelers
  • TieDexNew

    In stockShips from the UK · duties may apply

    $19,629.94+ $105.88 shippingChecked 34 min ago
    Visit TieDex
  • Designer Posh WatchNew

    Availability unknown

    $12,573.96+ $19.86 shippingChecked 34 min ago
    Visit Designer Posh Watch
  • Feldmar Watch CompanyNew

    Availability unknown

    $14,700.00Free shippingChecked 34 min ago
    Visit Feldmar Watch Company
  • WristlerNew

    Out of stockShips from the EU · duties may apply

    $11,061.65+ $66.37 shippingChecked 34 min ago
    Visit Wristler

Also available at

  • Momentum WatchesCheck price at Momentum Watches

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Sea Auto 30 [42mm] price history

Lowest price we've seen: $9,955.49 on Nov 13 at Montredo. Tracked across 11 stores since Nov 13.

About the Sea Auto 30 [42mm]

The Sea Auto 30 is a 42mm automatic diver watch. It is inspired by the Sea Quartz 30 worn in Magnum P.I. and uses a classic diver case based on the original 1980s silhouette. The profile is slim, and the seconds hand has a smooth sweep.

It runs on a Japanese Miyota 9015 automatic movement, which is slim and high-beat and has a 42-hour power reserve. A sapphire crystal sits slightly recessed below the steel rim of the bezel. The unidirectional glass bezel is used to track elapsed time.

The crown and caseback are screw-down, and the watch is water resistant to 300 meters. Super-LumiNova lume gives visibility in low light. The caseback is finely engraved with an Orca whale, a Pacific Coast icon.

Case size
42mm
Movement
Miyota 9015 automatic
Power reserve
42 hours
Crystal
Solid sapphire, recessed below the steel bezel rim
Bezel
Unidirectional, glass
Water resistance
300 m, with screw-down crown and caseback
Lume
Super-LumiNova
Caseback
Engraved with an Orca whale

Questions and answers

Is the Sea Auto 30 a real dive watch?
Yes. It is rated to 300m with a screw-down crown and caseback, and has a unidirectional bezel for timing dives.
How does it differ from the Sea Quartz 30?
The Sea Auto 30 swaps the quartz movement for a Miyota 9015 automatic, giving a smooth sweeping seconds hand and no battery changes.
How long does the power reserve last?
The Miyota 9015 has a 42-hour power reserve, so it keeps running about two days off the wrist.
Is the crystal scratch-resistant?
It uses a solid sapphire crystal, which is highly scratch-resistant, recessed slightly below the steel bezel rim.
Does it have a date?
The listed features do not mention a date function, so expect a clean three-hand dial.
What is on the caseback?
A finely engraved Pacific Coast orca whale.
Where is the Sea Auto 30 [42mm] cheapest?
At Montredo, for $9,955.49, 21% under what the other stores charge, as of our latest check.
What do buyers say about the Sea Auto 30 [42mm]?
Rated 5 out of 5 from 5 ratings.
Where can I buy the Sea Auto 30 [42mm]?
13 stores we checked sell it, including Chrono24.com, Montredo, Luxury Watches USA, Wristler, eBay.

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Stores we've priced the Sea Auto 30 [42mm] at

  • Diamond Source NYC deals and prices
  • Luxury Watches USA deals and prices

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