Hamilton Khaki Field vs Seiko 5 Sports GMT

Side-by-side comparison of specifications and features

HamiltonKhaki Field

36mm

Seiko5 Sports GMT

SSK001

Key Differences

Best Value

Seiko 5 Sports GMT (SSK001)

Starting from $400

Price Comparison

Hamilton Khaki Field

MSRP

$750

New

$988

Used

$394

Seiko 5 Sports GMT

MSRP

$400

New

$570

Used

$264

MSRP New (Amazon) Used (eBay)

Comparison of Hamilton Khaki Field, Seiko 5 Sports GMT
Specification	Hamilton Khaki Field	Seiko 5 Sports GMT
Pricing
MSRP	$750	$400
New Price	$988	$570
Used Price (Low)	$394	$264
Used Price (High)	$2,500	$1,023
30-Day Trend	↑ +14.6%	↑ +3.2%
Used Price Range	$394 - $2,500	$264 - $1,023
Identity
Reference	36mm	SSK001
Nickname	N/A	N/A
Style	Field, Tool	Sports, Tool
Release Era	1960s	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	100m (recreational diving)	100m (recreational diving)
Bezel	Fixed	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

Hamilton Khaki Field and Seiko 5 Sports GMT can overlap on price or use case, but the buying decision usually comes down to wrist presence versus easier fit, field character versus sports versatility. They both touch the tool 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.

Hamilton Khaki Field

Hamilton Khaki Field is a better fit for smaller wrists, mechanical-watch enthusiasts, field 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

Hamilton Khaki Field: 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

Hamilton Khaki Field: 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

Hamilton Khaki Field: 100m

Seiko 5 Sports GMT: 100m

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

Price and value

Hamilton Khaki Field: $573

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

Hamilton Khaki Field: field

Seiko 5 Sports GMT: sports

Hamilton Khaki Field leans more field, while Seiko 5 Sports GMT pulls toward sports use case — pick the one that matches how you will actually wear it.

Crystal and materials

Hamilton Khaki Field: 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 Hamilton Khaki Field If...

You want a smaller case footprint on the wrist.
You are specifically shopping for a field style watch.
You are comfortable paying more for a stronger feature set.

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 Hamilton Khaki Field 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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Hamilton Khaki Field

Check Price on AmazonOpens in new tab · Price may vary

Check Price on eBayFrom $573 · Live listings

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Seiko 5 Sports GMT

Check Price on AmazonOpens in new tab · Price may vary

Check Price on eBayFrom $387 · 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?

Hamilton Khaki Field — it is 36mm 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 GMT is the value pick at roughly $173 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.