Hamilton Khaki Field vs Seiko Prospex

Side-by-side comparison of specifications and features

HamiltonKhaki Field

38mm

SeikoProspex

SPB143

Key Differences

Best Value

Hamilton Khaki Field (38mm)

Starting from $660

Best Water Resistance

Seiko Prospex (SPB143)

200m (2x more)

Biggest Price Drop

Seiko Prospex (SPB143)

-6.6% in 30 days

Price Comparison

Hamilton Khaki Field

MSRP

$750

New

$660

Used

$313

Seiko Prospex

MSRP

$1,200

New

$1,409

Used

$900

MSRP New (Amazon) Used (eBay)

Comparison of Hamilton Khaki Field, Seiko Prospex
Specification	Hamilton Khaki Field	Seiko Prospex
Pricing
MSRP	$750	$1,200
New Price	$660	$1,409
Used Price (Low)	$313	$900
Used Price (High)	$1,199	$1,890
30-Day Trend	↓ -0.0%	↓ -6.6%
Used Price Range	$313 - $1,199	$900 - $1,890
Identity
Reference	38mm	SPB143
Nickname	N/A	N/A
Style	Field, Tool	Diver, Tool
Release Era	1960s	2020s
Dimensions
Diameter	38mm	40.5mm
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	Sapphire Crystal
Water Resistance	100m (recreational diving)	200m (diving)
Bezel	Fixed	Unidirectional rotating
Dial
Dial Color	Black	Gray
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 Prospex can overlap on price or use case, but the buying decision usually comes down to wrist presence versus easier fit, water-ready utility versus dressier everyday wear, field character versus diver versatility. Treat it as a value-versus-upgrade decision — confirm the extra spend solves a problem you will notice every week.

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 Prospex

Seiko Prospex is a better fit for buyers who want more wrist presence, mechanical-watch enthusiasts, diver styling.

Key Differences

Movement and upkeep

Hamilton Khaki Field: automatic movement

Seiko Prospex: 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: 38mm

Seiko Prospex: 40.5mm

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 Prospex: 200m

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

Price and value

Hamilton Khaki Field: $660

Seiko Prospex: $981

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 Prospex: diver

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

Crystal and materials

Hamilton Khaki Field: sapphire crystal · steel

Seiko Prospex: sapphire crystal · steel

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

Choose Hamilton Khaki Field If...

You want a smaller case footprint on the wrist.
You are specifically shopping for a field style watch.
You want the lower current entry price.

Choose Seiko Prospex If...

You prefer more dial presence and a larger case feel.
Swimming, beach use, or tougher daily wear is part of the plan.
You are specifically shopping for a diver style watch.

Price and Value Notes

Hamilton Khaki Field is often the value play at current pricing, while Seiko Prospex 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 $450 · Live listings

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Seiko Prospex

Check Price on AmazonOpens in new tab · Price may vary

Check Price on eBayFrom $981 · 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?

Start with case width and lug-to-lug. The watch that looks smaller on paper is often the safer choice, but lug shape and thickness still affect how it wears.

Which is better for swimming or rough daily wear?

Use the water resistance row as the first filter. Higher ratings generally give more flexibility for swimming and water exposure, but strap choice and overall condition still matter.

Should I choose based on price alone?

Price matters, but the better buy is the watch that matches your fit, feature priorities, and use case. Check live listings first, then decide whether the price gap actually changes the ownership experience.