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Seiko 5 Sports 28mm vs Seiko 5 Sports GMT

Side-by-side comparison of specifications and features

Seiko5 Sports
Seiko5 Sports GMT

Key Differences

Best Value
Seiko 5 Sports (28mm)
Starting from $277

Price Comparison

Seiko 5 Sports
MSRP
$350
New
$277
Used
$155
Seiko 5 Sports GMT
MSRP
$400
New
$513
Used
$265
MSRP New (Amazon) Used (eBay)
Comparison of Seiko 5 Sports, Seiko 5 Sports GMT
Specification
5 Sports
5 Sports GMT
Pricing
MSRP$350$400
New Price$277$513
Used Price (Low)$155$265
Used Price (High)$489$1,023
30-Day Trend+8.1%+35.5%
Used Price Range$155 - $489$265 - $1,023
Identity
Reference28mmSSK001
NicknameN/AN/A
StyleSports, CasualSports, Tool
Release Era2010s2020s
Dimensions
Diameter28mm42.5mm
ThicknessN/AN/A
Lug WidthN/AN/A
Lug to LugN/AN/A
Movement
MovementAutomaticAutomatic
Power Reserve / BatteryN/AN/A
AccuracyN/AN/A
Case
Case MaterialStainless SteelStainless Steel
CrystalHardlexHardlex
Water Resistance100m (recreational diving)100m (recreational diving)
BezelFixedBidirectional 24-hour
Dial
Dial ColorBlackBlack
LuminousYesYes
Community
Review RatingN/AN/A
In CollectionsN/AN/A
On WishlistsN/AN/A
Forum ThreadsN/AN/A

Quick Summary

Seiko 5 Sports 28mm and Seiko 5 Sports GMT can look close on a spec sheet, yet the tradeoffs that matter most are usually wrist presence versus easier fit. They both touch the sports use case, so smaller spec differences can matter more than brand preference.

How to choose

The biggest practical difference is usually movement and upkeep. Start with wrist fit and movement preference, then use water resistance and price to break the tie.

Seiko 5 Sports 28mm

Seiko 5 Sports 28mm is a better fit for smaller wrists, mechanical-watch enthusiasts, sports styling.

Seiko 5 Sports GMT

Seiko 5 Sports GMT is a better fit for buyers who want more wrist presence, mechanical-watch enthusiasts, sports styling.

Key Differences

Movement and upkeep

Seiko 5 Sports 28mm: automatic movement

Seiko 5 Sports GMT: automatic movement

Both use the same movement type, so maintenance differences are limited and fit or feature details should decide the purchase.

Size and wearability

Seiko 5 Sports 28mm: 28mm

Seiko 5 Sports GMT: 42.5mm

Fit is a real separator here — compare case width and lug-to-lug before deciding, especially if wrist comfort matters more than headline features.

Water resistance

Seiko 5 Sports 28mm: 100m

Seiko 5 Sports GMT: 100m

Water resistance is similar on paper, so focus on fit, features, and price instead.

Price and value

Seiko 5 Sports 28mm: $277

Seiko 5 Sports GMT: $400

There is a real price gap here — treat the more expensive option as an upgrade decision and confirm whether the extra spend buys something you will notice in weekly use.

Style and use case

Seiko 5 Sports 28mm: sports

Seiko 5 Sports GMT: sports

Both lean into a similar sports use case — the choice is more about fit, features, and price than category.

Crystal and materials

Seiko 5 Sports 28mm: Hardlex crystal · steel

Seiko 5 Sports GMT: Hardlex crystal · steel

Materials are broadly similar, so finish, fit, and price will matter more than the materials list alone.

Choose Seiko 5 Sports 28mm If...

  • You want a smaller case footprint on the wrist.
  • You want the lower current entry price.

Choose Seiko 5 Sports GMT If...

  • You prefer more dial presence and a larger case feel.
  • You are comfortable paying more for a stronger feature set.

Price and Value Notes

Seiko 5 Sports 28mm is often the value play at current pricing, while Seiko 5 Sports GMT makes more sense if you will use its extra features regularly.

There is a real price gap here — treat the more expensive option as an upgrade decision and confirm whether the extra spend buys something you will notice in weekly use.

Where to Check Deals

Check current deals on Amazon and eBay using the buttons below — listing prices, seller quality, and condition can change quickly.

Check current deals on Amazon and eBay

Prices change often, so compare the latest listings and condition options before you buy.

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Seiko 5 Sports

Check Price on AmazonOpens in new tab · Price may vary
Check Price on eBayFrom $200 · Live listings

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Seiko 5 Sports GMT

Check Price on AmazonOpens in new tab · Price may vary
Check Price on eBayFrom $508 · Live listings

Affiliate links — WatchCompared earns a commission on qualifying purchases. This doesn't affect your price.

Comparison FAQ

Which one is better for smaller wrists?

Seiko 5 Sports 28mm — it is 28mm wide versus 42.5mm.

Which is better for swimming or rough daily wear?

They are rated the same, so water resistance will not decide this. Choose on strap material and how much you mind scratching the case.

Is the more expensive one worth it?

Seiko 5 Sports 28mm is the value pick at roughly $123 less. Pay more only if a specific difference above matters to you — otherwise the cheaper one is the smarter buy. Confirm live listings, since marketplace pricing moves.

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