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Seiko

SEIKO PROSPEX SPB321J1 GRADATED BLUE DIAL SUMO 42MM AUTOMATIC DIVER

SEIKO PROSPEX SPB321J1 GRADATED BLUE DIAL SUMO 42MM AUTOMATIC DIVER

$849.49 USD
$849.49 USD
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The SPB321 is a rugged Prospex “Sumo”-style automatic diver built around Seiko’s reliable 6R35 movement with approximately 70 hours of power reserve and manual winding capability. It wears confidently with a 45 mm stainless-steel case, a uni-directional rotating bezel with a blue ceramic insert, and a sapphire crystal with anti-reflective coating. The distinctive gradated blue dial with pressed texture is paired with clear date at 3 o’clock and strong LumiBrite-filled hands and markers for excellent underwater legibility. Finished on a super-hard-coated steel bracelet with a diver’s extender, the SPB321 is ISO-rated for 200 m water resistance, combining everyday wearability with true dive watch capability. 

  • Case size (W× Hx L)

    45.0 x 13.4 x 52.6 mm

  • Case material

    Stainless steel (hard coating)

  • Band

    Stainless steel bracelet with super-hard coating

  • Water resistance

    ISO 200-meter water resistance

  • Movement

    Automatic caliber 6R35 

  • Bezel

    Unidirectional bezel 

  • Crystal

    Sapphire crystal with anti-reflective coating on the inner surface

  • Lumibrite

    LumiBrite on hands and index(es)

  • Functions

    Date display
    Stop second hand function(hacking) with Hand-winding
    Hour, minute, seconds


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