Seiko Prospex SBBN027

Seiko Prospex SBBN027
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  • $1,470.00
  • While our online ordering system is new, we’d still love to talk to you as we’ve always done in the past to give you the personal attention you’ve come to expect from Topper.

About this model

There's an immensely cool Seiko Prospex video wherein Seiko engineers strap two Tuna watches to an underwater submersible unit, and drop it off the Continental Pacific Shelf, near the northeast coast of Japan. Without spoiling the full results, we'll just say that the 1000m Prospex Tuna far outperforms the already incredible depth rating on the dial. The Japan Domestic Market (JDM) exclusive SBBN027 shares the same remarkable capability as the tested instrument, thanks to the monocoque titanium case and custom-built 7C46 quartz movement (accurate to +/-5 seconds per month), but introduces in a few key details, including its polished ceramic bezel shroud, and brilliant yellow-orange bezel inlay, rightfully earning this reference the nickname "Bumblebee" by dive watch fans.


  • Battery powered quartz movement
  • Caliber # 7C46
  • Pure titanium (hard coating) ceramics case and bezel material 
  • Silicon band
  • Sapphire glass
  • Lumibrite visibilty increased by 60% of previous model
  • ± 15 seconds per month Accuracy
  • 1000m waterproof (for saturation diving)
  • 5 years Battery life 
  • Antimagnetic
  • Size49.4mm × 49.4mm × 15.3mm
  • 120g Weight
  • Screw Back
  • Rotating bezel
  • Screw lock type crown
  • One-piece structure 
  • Yellow Bezel Color
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