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Seiko Monster Watch

Seiko Monster Watch

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Dive Watch

Featuring glow-in-the-dark hour markings shaped like shark teeth and a water resistance of 200 meters, the Seiko Monster Automatic Watch is a classic diver. It's equipped with a 24-jewel 4R36 automatic movement, so you won't have to worry about it ever running out of battery while on a dive. And thanks to the LumiBrite hour markings, the watch is easy to read, even at the darkest depths.

Note: At checkout, you'll have your choice between 6 style options: SRP309, SRP311 (-$12), SRP313 (-$17), SRP313K2, SRP315 (-$22), and SRP315K2 (-$8.)

Seiko Monster Watch
Seiko Monster Watch


Fitted with a slightly domed Hardlex mineral crystal, the Monster features a solid screw-in case back and a screw-down machined crown for added protection against water. A concave unidirectional bezel makes it easy to keep track of elapsed time, while a date window also displays the day of the week.

Seiko Monster Watch
Seiko Monster Watch
Seiko Monster Watch

Color Options

Orange, Steel Bracelet SRP309
Black/Red, Rubber Strap SRP313
Black/Red, Steel Bracelet SRP313K2
Orange Fade, PVD IP Steel Bracelet SRP311 (-$12)
Orange, PVD IP Bezel, Rubber Strap SRP315 (-$22)
Orange, PVD IP Bezel, Steel Bracelet SRP315K2 (-$8)


  • Seiko
  • 4R36 automatic movement
  • Hand-winding compatible
  • Hacking seconds
  • Screw down crown
  • LumiBrite luminescent hour markings and hands
  • Domed Hardlex mineral crystal
  • 120-click bezel
  • Stainless steel bracelet with a dual push-button deployant clasp
  • Day and date at 3 o'clock
  • Case width: 42 mm
  • Thickness: 13 mm
  • Lug width: 20 mm
  • Water resistant: 200 m


  • 2-year Massdrop warranty


All orders will be shipped by Massdrop.

Estimated ship date is Jan 28, 2016 PT.

After the drop ends, payment will be collected and the group’s order will be submitted to the vendor up front, making all sales final. Check the discussion page for updates on your order.