Seiko 5 Sports 5 Sports Sports Style Stainless Steel / Blue / NATO

Reference SRPD51K2

Seiko 5 Sports Sports Style Stainless Steel / Blue / NATO

About this watch

The Seiko SRPD51K2, also known as the SRPD51, is a stunning blend of classic design and modern technology. Launched in 2019, this watch is a part of Seiko’s renowned 5 Sports collection, which is celebrated for its robustness and versatility. With a striking blue sunburst dial and a reliable automatic movement, the SRPD51K2 is not just a watch; it's a statement piece. The stainless steel case not only enhances durability but also gives it a sleek, polished look. Plus, the Hardlex glass is designed to withstand scratches, making it an excellent choice for daily wear. At the heart of the Seiko SRPD51K2 is the caliber 4R36 automatic movement. This reliable movement boasts a 41-hour power reserve, allowing you to take it off for a weekend without worrying about it stopping. It features a frequency of 21,600 vibrations per hour, ensuring excellent accuracy. The watch displays hours, minutes, seconds, and even the date and day, making it incredibly functional for everyday use. With a water resistance of up to 100 meters, the SRPD51K2 is a solid choice for swimmers and snorkelers. It's built to withstand the elements. The rotating bezel adds an extra layer of utility, especially for diving enthusiasts who need to track elapsed time underwater.

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Key Features

Seiko caliber 4R36 automatic movement
Stainless steel case with Hardlex glass
100m water resistance

Specifications

Brand

Seiko

Family

5 Sports

Model

5 Sports Sports Style Stainless Steel / Blue / NATO

Reference

SRPD51K2

Movement

4r36

Movement Features

Hours, Minutes, Seconds
Date, Day

Case

Stainless Steel 42.5mm

Dial Color

Blue

Crystal

Hardlex

Water Resistance

100

Current Listings

Vintage Seiko 5 Sportsmatic Deluxe 7619-7010 - $225 Shipped!

Seiko - 7619-7010 · $225

a vintage Seiko 5 Sportsmatic Deluxe featuring an automatic movement housed in a 38mm case with a stunning sunburst dial and day/date window.

Condition: great overall condition with light signs of wear
Case size: 38mm diameter
Bracelet size: fits wrists up to approximately 7.2 inches

Posted at

Feb 10, 2026, 8:32 AM

Active

View listing on r/WatchExchange

Seiko 5 Sports 55th Anniversary Ultraseven SRPJ79

Seiko - SRPJ79 · $335

This is a Limited Edition Seiko 5 Sports Ultraseven, which was not worn often. It comes with two watch bands.

Seller Experience: 28 swaps in r/knife_swap
Shipping: Only via Zelle, Venmo, Cashapp, or Apple Pay; no international shipping

Posted at

Feb 9, 2026, 3:48 PM

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View listing on r/WatchExchange

Seiko 5 sports Automatic Black SRPK29 - $200 shipped CONUS

Seiko - SRPK29 · $200

For sale is my Seiko SRPK29 automatic I purchased new 1 year ago for $300. It has some wear on it, but overall is in good condition.

Condition: good
Case Diameter: 38mm
Thickness: 12.1mm
Length: 44.2mm

Posted at

Feb 8, 2026, 4:46 PM

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Seiko 5 Sports - Eastern Arabic Dial

Seiko - 5 Sports · $4,000

A black/gray limited edition Seiko 5 Sports with an Eastern Arabic dial, featuring a unique Middle-Eastern market configuration. The watch is in good condition with some superficial marks and light wear on the clasp.

Condition: Excellent condition
Dial type: Eastern Arabic
Bracelet type: Miltat Jubilee-style

Posted at

Feb 8, 2026, 1:54 PM

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Brand New Seiko 5 Sports x Snoopy Peanuts SRPK25

Seiko - SRPK25K1 · $750

The Seiko 5 Sports SRPK25K1 is a sporty watch with a robust steel case, vibrant white dial, and automatic caliber 4R36. It offers reliable timekeeping, up to 41 hours of power reserve, and water resistance of 100 meters.

Condition: Brand new, never worn
Case diameter: 38mm
Water resistance: 100 meters (10 bar)
Movement type: Automatic

Posted at

Feb 5, 2026, 8:27 PM

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Seiko 5 Sports SKX Sports Style GMT SSK001 - With Box - Black Dial

Seiko - SKX Sports Style GMT SSK001 · $275

A Seiko 5 Sports SKX Sports Style GMT watch with a black dial and box. The watch is fully functional but has some minor imperfections.

Condition: Fully functional, minor cosmetic flaws
Box included: true
Case size: 40mm diameter

Posted at

Feb 5, 2026, 3:07 PM

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Seiko 5 Sports Speed timer Automatic Watch. $420 Shipped.

Seiko - 6139-8050 · $420

This Seiko 5 Sports Speed timer Automatic Watch is a Japan-only model with a blue sunburst dial and features an automatic movement, chronograph function, date window, and stainless steel case.

Condition: Good Working Condition
Movement: Seiko Caliber 6139
Jewels: 21 Jewels
Manufacture: Japan

Posted at

Feb 4, 2026, 11:36 AM

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Seiko 5 Sports SRPJ87 "36mm Mid-Field" or "Champagne Flieger" MADE IN JAPAN $185

Seiko - SRPJ87 · $185

This Seiko 5 Sports SRPJ87 features a stainless steel case with a champagne dial and is known as the '36mm Mid-Field' or 'Champagne Flieger'. It has a curved hardlex crystal, 100m water resistance, and a see-through exhibition screw caseback. The watch is powered by the reliable Seiko Caliber 4R36.

Condition: Running good
Case Diameter: 36.4mm
Lug Width: 18mm
Water Resistance: 100m (10 Bar)

Posted at

Feb 4, 2026, 9:52 AM

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View listing on r/WatchExchange