Side by side

Hamilton Khaki Aviation Pilot Pioneer MechanicalvsSeiko 5 Sports Field series

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

5 Sports Field series
Seiko5 Sports Field series
MSRP $450

At a glance

13 of 29 specs differ
Diameter
Khaki Aviation Pilot Pioneer Mechanical36mm
5 Sports Field series39.4mm
Power Reserve
Khaki Aviation Pilot Pioneer Mechanical80h
5 Sports Field series41h
Water Resistance
Khaki Aviation Pilot Pioneer Mechanical100m
5 Sports Field series100m
MSRP
Khaki Aviation Pilot Pioneer Mechanical$975
5 Sports Field series$450

Full specifications

Case

5 specs
Category
Pilot
GMT
Diameter
36mm
39.4mm
Thickness
9.95mm
13.6mm
Lug-to-Lug
46mm
47.9mm
Lug Width
18mm
20mm

Crystal & Dial

3 specs
Crystal
Mineral
Hardlex
Crystal Shape
Flat
Curved
Lume
None
LumiBrite on hands and index(es)

Movement

4 specs
Caliber
H-50
4R34
Type
Manual
Automatic
Power Reserve
80h
41h
Jewels
25
24

Pricing

1 specs
MSRP
$975
$450

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Hamilton Khaki Aviation Pilot Pioneer Mechanical

Owners widely praise the Hamilton Khaki Aviation Pilot Pioneer Mechanical for its superior fit and finish, clean and unique design, and overall value, with one owner calling it a significant step up in build quality. The watch measures 36mm wide with a 41.7mm lug-to-lug and 12.8mm thickness. Some owners express concern over its mineral crystal, with one noting the bezel's detents are "kinda whatever." On balance, owners rate the Hamilton Khaki Aviation Pilot Pioneer Mechanical highly for its build quality and value proposition.

Seiko 5 Sports Field series

The Seiko 5 Sports Field series offers an accessible explorer-style watch with a 41mm stainless steel case, 100m water resistance, and a Hardlex crystal. The Field GMT model features a caller GMT complication powered by the 4R34 movement, while the standard Field models use the 4R36 with a 41-hour power reserve. Both models include Arabic numerals coated in LumiBrite and a lumed pearl on the bezel. On balance, the Seiko 5 Sports Field GMT is a well-regarded entry-level explorer watch for its price point, despite its office-style GMT function.

From video reviewers

The prominent five-sided GMT hand enhances legibility and adds a sophisticated aesthetic to the watch. The Seiko 5 Sports Field series offers similar functionality to the Explorer 2 at a lower price, making it a valuable option. Reviewers disagree on whether it's a missed opportunity for Seiko to release this model first, with one reviewer implying it would have been a more logical addition to their lineup.

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