Glycine Combat Sub vs Seiko 5 Sports GMT

Side-by-side comparison of specifications and features

GlycineCombat Sub

36mm

Seiko5 Sports GMT

SSK001

Key Differences

Best Value

Seiko 5 Sports GMT (SSK001)

Starting from $400

Best Water Resistance

Glycine Combat Sub (36mm)

200m (2x more)

Price Comparison

Glycine Combat Sub

MSRP

$695

New

$749

Used

$505

Seiko 5 Sports GMT

MSRP

$400

New

$513

Used

$265

MSRP New (Amazon) Used (eBay)

Comparison of Glycine Combat Sub, Seiko 5 Sports GMT
Specification	Glycine Combat Sub	Seiko 5 Sports GMT
Pricing
MSRP	$695	$400
New Price	$749	$513
Used Price (Low)	$505	$265
Used Price (High)	$2,700	$1,023
30-Day Trend	↑ +7.9%	↑ +35.5%
Used Price Range	$505 - $2,700	$265 - $1,023
Identity
Reference	36mm	SSK001
Nickname	N/A	N/A
Style	Diver, Tool, Sports	Sports, Tool
Release Era	2010s	2020s
Dimensions
Diameter	36mm	42.5mm
Thickness	N/A	N/A
Lug Width	N/A	N/A
Lug to Lug	N/A	N/A
Movement
Movement	Automatic	Automatic
Power Reserve / Battery	N/A	N/A
Accuracy	N/A	N/A
Case
Case Material	Stainless Steel	Stainless Steel
Crystal	Sapphire Crystal	Hardlex
Water Resistance	200m (diving)	100m (recreational diving)
Bezel	Unidirectional rotating	Bidirectional 24-hour
Dial
Dial Color	Black	Black
Luminous	Yes	Yes
Community
Review Rating	N/A	N/A
In Collections	N/A	N/A
On Wishlists	N/A	N/A
Forum Threads	N/A	N/A

Quick Summary

This Glycine Combat Sub vs Seiko 5 Sports GMT comparison is less about a universal winner and more about wrist presence versus easier fit, water-ready utility versus dressier everyday wear, diver character versus sports versatility. Start with fit first — case width and lug-to-lug usually matter more than secondary features if wrist comfort is a concern.

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.

Glycine Combat Sub

Glycine Combat Sub is a better fit for smaller wrists, mechanical-watch enthusiasts, diver 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

Glycine Combat Sub: 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

Glycine Combat Sub: 36mm

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

Glycine Combat Sub: 200m

Seiko 5 Sports GMT: 100m

Water resistance is a meaningful separator here — the higher-rated option gives more flexibility for swimming or rougher daily use.

Price and value

Glycine Combat Sub: $558

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

Glycine Combat Sub: diver

Seiko 5 Sports GMT: sports

Glycine Combat Sub leans more diver, while Seiko 5 Sports GMT pulls toward sports use case — pick the one that matches how you will actually wear it.

Crystal and materials

Glycine Combat Sub: sapphire crystal · steel

Seiko 5 Sports GMT: Hardlex crystal · steel

Crystal choice can change long-term wear expectations — one may prioritize scratch resistance while the other keeps cost or vintage feel in check.

Choose Glycine Combat Sub If...

You want a smaller case footprint on the wrist.
Swimming, beach use, or tougher daily wear is part of the plan.
You are specifically shopping for a diver style watch.

Choose Seiko 5 Sports GMT If...

You prefer more dial presence and a larger case feel.
You are specifically shopping for a sports style watch.
You want the lower current entry price.

Price and Value Notes

Seiko 5 Sports GMT is often the value play at current pricing, while Glycine Combat Sub 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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Glycine Combat Sub

Check Price on AmazonOpens in new tab · Price may vary

Check Price on eBayFrom $558 · 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?

Glycine Combat Sub — it is 36mm wide versus 42.5mm.

Which is better for swimming or rough daily wear?

Glycine Combat Sub — it is rated 200m versus 100m. Both are in the same broad bracket, so treat this as a tiebreaker rather than a deciding factor.

Is the more expensive one worth it?

Seiko 5 Sports GMT is the value pick at roughly $158 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.