Black Friday · Through November 30

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Code WATCH10

Online only, through November 30, 2026 at 11:59 pm PT. One discount code per watch.

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Seiko - Brand New

Seiko 5 Sports - SRPH31

  • 39.4 mm case
  • 10 bar water resistant
Sale price $252.00
Regular price $315.00
Sold out

About this timepiece

Smartly dressed in navy, the Seiko 5 Sports Field Series (ref. SRPH31) is a proud everyday field watch with a navy blue dial and a matching navy nylon strap finished with an orange lining. LumiBrite on the hands and indexes keeps the dial easy to read in low light, and a day-date display tracks the week. A curved Hardlex crystal tops the 39.4mm stainless steel case, giving the dial a clean, classic presentation.

The caliber 4R36 automatic movement offers 24 jewels and approximately 41 hours of power reserve, and it can be wound by hand whenever you like. The see-through case back gives a view of the movement at work, and the watch is water resistant to 10 bar (100 meters) with 4,800 A/m magnetic resistance. At 75 grams on its nylon strap, it moves easily from a workday in the city to a weekend outdoors.

Features

  • Navy blue dial – a refined, versatile shade with LumiBrite hands and indexes.
  • Navy nylon strap – with an orange lining that adds a flash of color.
  • Caliber 4R36 – automatic with manual winding, 24 jewels and about 41 hours of power reserve.
  • Day-date display – the day and date at a glance.
  • 10 bar water resistance – 100 meters, plus 4,800 A/m magnetic resistance.

Specifications

  • Reference: SRPH31
  • Collection: Seiko 5 Sports Field series
  • Gender: Men's
  • Caliber Number: 4R36
  • Movement Type: Automatic with manual winding
  • Power Reserve: Approx. 41 hours
  • Jewels: 24
  • Functions: Stop second hand function, day/date display
  • Case Material: Stainless steel
  • Diameter: 39.4 mm
  • Thickness: 13.2 mm
  • Lug-to-Lug: 48.1 mm
  • Dial Color: Navy blue
  • Crystal: Curved Hardlex
  • LumiBrite: LumiBrite on hands and index(es)
  • Band: Navy nylon strap with orange lining
  • Distance Between Lugs: 20 mm
  • Water Resistance: 10 bar (100 meters)
  • Magnetic Resistance: 4,800 A/m
  • Weight: 75.0 g
  • Features: See-through case back

Timepiece History

Seiko's story began in 1881, when a 21-year-old entrepreneur, Kintaro Hattori, opened a shop selling and repairing watches and clocks in central Tokyo. The first watch to carry the Seiko name followed in 1924, and Seiko went on to introduce a long line of watchmaking firsts, including the Quartz Astron, the world's first quartz wristwatch, on December 25, 1969. In 2024, Seiko celebrated the 100th anniversary of the Seiko brand.

The SRPH31 belongs to Seiko 5 Sports, a collection rooted in the Seiko Sportsmatic 5 of 1963, Japan's first automatic day-date watch. Seiko 5 Sports itself was born in 1968, adding enhanced water resistance, a strengthened crystal and luminous hands and markers to the Seiko 5 essentials of an automatic movement, a day-date display, water resistance, a recessed crown and a durable case and bracelet, and it found worldwide favor as a go-anywhere watch. In 2019, Seiko 5 Sports was rebranded to carry watch culture forward to the next generation. It belongs to the Field series, designed to bridge the city and the outdoors.

  • Sold out

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Lease-to-own · Acima or Progressive No credit needed* · 90-day purchase option

Lease-to-own is not a loan or credit, so there's no APR. Your payment amount and schedule are set in your lease agreement and depend on your state and pay schedule. The lowest-cost way to own is the 90-day purchase option.

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  • Approvals up to $5,000
  • 90-day early purchase option (3 months in CA)
  • Own in 12, 18 or 24 months
  • Payments set around your payday
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  • No credit needed*
  • 90-day purchase option (3 months in CA)
  • 12 months to ownership
  • Weekly, bi-weekly or monthly payments
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