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Seiko Prospex Automatic Diver SRPL13 vs Seiko Prospex Samurai SRPL15

These are the same watch underneath: same 4R35 movement, same 41.7mm case, same 200m diver's rating, same Hardlex crystal. The SRPL13 is the classic steel Samurai; the SRPL15 is the black hard-coated version. Buy the SRPL13 if you want a versatile everyday diver that hides scratches and matches everything. Buy the SRPL15 if you want the stealth look and accept that the coating can chip and shows wear on edges over years. Owners rate both highly; the movement is proven but gains a few seconds a day and the Hardlex will pick up fine scratches.

  • Choose the SRPL13 if you want the standard stainless Samurai that wears with any strap and hides scuffs better over time.
  • Choose the SRPL15 if the blacked-out look is the point and you accept coated steel can chip at the edges.

Prices

  • Seiko Prospex Automatic Diver SRPL13: $476.00 at Time Square Clock Shop (last seen Nov 8)
  • Seiko Prospex Samurai SRPL15: $414.00 at Paramount Jewelers (last seen Nov 8)
  • Difference: the Seiko Prospex Samurai SRPL15 is $62.00 cheaper than the Seiko Prospex Automatic Diver SRPL13 at the latest prices (Nov 8)
Seiko
Seiko Watch - Prospex Automatic Diver - SRPL13

Seiko Prospex Automatic Diver SRPL13

Seiko Watch - Prospex Automatic Diver - SRPL13

4.7(13 ratings)
$476.00at Time Square Clock ShopObserved Nov 8, 2026, 5:32 PM
See all prices and details
Visit Time Square Clock Shop
Pros
  • Classic Samurai look that ages gracefully
  • Bare steel can be refinished
  • Pairs with leather, rubber or NATO easily
  • ISO diver's rating and screw-down crown
Cons
  • Heavier on the wrist
  • Polished surfaces show swirl marks
  • Hardlex scratches more than sapphire
Seiko
SRPL15 Prospex Samurai Diver 41.7mm

Seiko Prospex Samurai SRPL15

SRPL15 Prospex Samurai Diver 41.7mm

4.9(12 ratings)
$414.00at Paramount JewelersObserved at 8:23 PM
See all prices and details
Visit Paramount Jewelers
Pros
  • Blacked-out finish stands out
  • Lighter listed weight
  • Same proven movement and diver specs
  • Hard coating resists light scratches
Cons
  • Coating can chip at lug edges and bezel
  • Harder to match straps
  • Black finish wear is permanent
  • Hardlex still scratches

What separates them

Seiko Prospex Automatic Diver SRPL13Seiko Prospex Samurai SRPL15
Case finishBare stainless steelBlack hard coating over stainless steel
Weight170 g100 g listed
Movement4R35 automatic, 23 jewels, ~41h reserve4R35 automatic, 23 jewels, ~41h reserve
Case size41.7mm wide, 12.3mm thick, 49.5mm lug-to-lug41.7mm wide, 12.3mm thick, 49.5mm lug-to-lug
Water resistance200m diver's, ISO-rated200m, scuba-rated
CrystalHardlexHardlex
Long-term wearScratches polish out; patina is normalCoating can chip and expose steel at edges
Strap versatilitySteel pairs with any strap colorBlack case limits strap choices

Price history

  • Seiko Prospex Automatic Diver SRPL13: lowest $478.00 on Nov 8 at Paradise Jewelry.
  • Seiko Prospex Samurai SRPL15: lowest $439.00 on Nov 1 at eBay.

Prices at every store

Seiko Prospex Automatic Diver SRPL13

  • Time Square Clock ShopNew

    In stockReturn policy

    $476.00Observed Nov 8, 2026, 5:32 PM
    Visit Time Square Clock Shop
  • Mimo's JWNew

    In stockReturn policy

    $515.00Observed Nov 8, 2026, 5:31 PM
    Visit Mimo's JW
  • Paradise JewelryNew

    Availability unknown

    $478.00Observed Nov 8, 2026, 5:31 PM
    Visit Paradise Jewelry
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $500.00Free shippingObserved Nov 8, 2026, 5:31 PM
    Visit Amazon

Also available at

  • japan-selectCheck price at japan-select
  • Topper Fine JewelersCheck price at Topper Fine Jewelers
  • Gem BijouCheck price at Gem Bijou
All 24 stores and price history →

Seiko Prospex Samurai SRPL15

  • Paramount JewelersNew

    In stockReturn policy

    $414.00Observed at 8:23 PM
    Visit Paramount Jewelers
  • Teddy BaldassarreNew

    In stockReturn policy

    $460.00Observed at 8:33 PM
    Visit Teddy Baldassarre
  • eBayNew

    Availability unknown

    $439.00Observed Nov 1, 2026, 8:52 AM
    Visit eBay
  • WalmartNew

    Availability unknown

    $517.50Observed Nov 1, 2026, 8:52 AM
    Visit Walmart

Also available at

  • ELI ADAMS JEWELERSCheck price at ELI ADAMS JEWELERS
  • Exquisite TimepiecesCheck price at Exquisite Timepieces
  • Time Square Clock ShopCheck price at Time Square Clock Shop
All 4 stores and price history →

Specs compared

SpecSeiko Prospex Automatic Diver SRPL13Seiko Prospex Samurai SRPL15
Power ReserveApprox. 41 hoursapproximately 41 hours
Jewels2323
Case Thickness12.3mm12.3 mm
Case Diameter41.7mm41.7 mm
Lug-to-lug49.5mm49.5 mm
CrystalHardlexHardlex
Water Resistance200m / 660ft diver’s200 meters (660 feet), suitable for scuba diving
Weight170.0g100.0g
Caliber Number4R35—
Movement TypeAutomatic with manual winding—
Case MaterialStainless steel—
Distance Between Lugs20—
Show all 16 specsShow fewer specs
SpecSeiko Prospex Automatic Diver SRPL13Seiko Prospex Samurai SRPL15
Movement—Automatic with manual winding
Caliber—4R35
Lug width—20 mm
Magnetic resistance—4,800 A/m

What reviewers say

Seiko Prospex Automatic Diver SRPL13

  • 4.7 / 513 ratings

Owners rate it highly, praising the compact Samurai case, the lume and the solid feel for an automatic diver. Complaints center on the Hardlex crystal and the watch's weight and size on smaller wrists.

What people mention
  • Case sizeMixedOwners like the slimmer Samurai profile but say 41.7mm wide and 49.5mm lug-to-lug still wears big on small wrists.
  • LumePraisedLumiBrite hands and markers stay bright through the night.
  • CrystalCriticisedBuyers wish it had sapphire, since Hardlex scratches with daily wear.
  • MovementPraisedThe 4R35 keeps good time and the 41-hour reserve covers a weekend off the wrist.

Seiko Prospex Samurai SRPL15

  • 4.9 / 512 ratings

Owners rate the SRPL15 highly, with 4.9 out of 5 from 12 ratings. They like the blacked-out Samurai look, the solid build and the reliable 4R35 movement.

What people mention
  • FinishPraisedOwners like the black hard-coated case and how it looks in person.
  • BuildPraisedReviewers describe the case and bezel as solid and well made.
  • MovementPraisedThe 4R35 is called reliable and accurate for the price.
  • CrystalCriticisedSome wish it had sapphire instead of Hardlex, which scratches more easily.

Questions and answers

Is the SRPL15 just a black SRPL13?
Yes. Both use the 4R35 movement in the same 41.7mm case with 200m rating and Hardlex. The difference is the black hard coating on the SRPL15.
Which lasts longer?
The SRPL13. Bare steel can be polished and refinished; a chipped coating on the SRPL15 cannot be repaired without recoating the case.
Which is better for daily wear?
The SRPL13. It hides scuffs better, matches more straps and looks right with a suit or a t-shirt.
Is the SRPL15 worth stepping up to?
Only if you want the black look. You get the same movement and specs, so pay for the finish, not performance.
Does either have a sapphire crystal?
No. Both use Seiko's Hardlex, which resists shattering but scratches more easily than sapphire.
How accurate is the 4R35?
Seiko rates it within roughly -35 to +45 seconds a day. Most owners see better, but expect to reset it every week or two.

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More comparisons

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  • SRPL15 Prospex Samurai Diver 41.7mm vs Seiko Prospex Sea Samurai Diver Blue Dial Stainless Steel Watch SRPL51

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