Side-by-side comparison of specifications and features
Compare visual case presence and physical footprint on one shared wrist. Measure your top-down wrist width for a stronger result; lug-to-lug is used when the catalog has it.
Medium (6.7″)
Estimated top width: 56.7 mm
Preliminary range: 54.7–61.8 mm.
Watch A
Visual presence
ModerateCase covers 64% of your modeled wrist width.
Physical footprint
Clear spaceEstimated clearance: 5.2 mm per side.
Watch B
Visual presence
BoldCase covers 75% of your modeled wrist width.
Physical footprint
Clear spaceEstimated clearance: 5.3 mm per side.
Proportional guide only: visual presence and physical footprint do not predict comfort. Weight, thickness, caseback shape, rigid lugs, strap stiffness, wrist-bone prominence, wearing tension, bezel design, and case curvature change how a watch actually wears.
Start with the specifications that meaningfully differ. Expand the complete table for reference details and missing-data context.
| Specification | Hamilton Khaki Field | Seiko 5 Sports GMT |
|---|---|---|
| Pricing | ||
| MSRP5 Sports GMT is $350 less at MSRP | $750 | $400 |
| New Price5 Sports GMT is $393.6 less based on the current snapshot | $964 | $570 |
| Used Price (Low)Khaki Field is $3.4 less at the low end | $350 | $353 |
| Used Price (High) | $1,250 | $931 |
| 30-Day Trend | ↓ -0.3% | ↓ -34.0% |
| Used Price Range | $350 - $1,250 | $353 - $931 |
| Identity | ||
| Style | Field, Tool | Sports, Tool |
| Dimensions | ||
| DiameterKhaki Field is 6.5mm smaller | 36mm | 42.5mm |
| Thickness | N/A | 13.6mm |
| Lug to Lug | 46.2mm | 46mm |
| Case | ||
| Crystal | Sapphire Crystal | Hardlex |
| Bezel | Fixed | Bidirectional 24-hour |
2 fields are excluded from the differences view because one watch lacks comparable data. Use “All specs” to inspect those gaps.
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.
Bottom line
Fit is a real separator here — compare case width and lug-to-lug before deciding, especially if wrist comfort matters more than headline features. Choose Hamilton Khaki Field if you want a smaller case footprint on the wrist; choose Seiko 5 Sports GMT if you prefer more dial presence and a larger case feel.
Choose Hamilton Khaki Field when
Hamilton Khaki Field is a better fit for smaller wrists, mechanical-watch enthusiasts, field styling.
Choose Seiko 5 Sports GMT when
Seiko 5 Sports GMT is a better fit for buyers who want more wrist presence, mechanical-watch enthusiasts, sports styling.
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 · L2L 46.2mm
Seiko 5 Sports GMT: 42.5mm · L2L 46mm · 161g
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: $596
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.
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.
Check current deals on Amazon and eBay using the buttons below — listing prices, seller quality, and condition can change quickly.
Prices change often, so compare the latest listings and condition options before you buy.
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Hamilton Khaki Field
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Seiko 5 Sports GMT
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Hamilton Khaki Field — it is 36mm wide versus 42.5mm.
They are rated the same, so water resistance will not decide this. Choose on strap material and how much you mind scratching the case.
Seiko 5 Sports GMT is the value pick at roughly $196 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.
Evidence & Method
This page currently relies on normalized catalog fields and calculated differences. No external reviewer observation is used in its verdict.
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