Side by side

Hamilton Khaki Aviation Pilot PioneervsSeiko 5 Sports Field series

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

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

Owners widely praise the Hamilton Khaki Aviation Pilot Pioneer for its authentic pilot design, legible cathedral hands, and textured matte black dial, with the 36mm and 38mm case sizes noted as wearing well. The applied numerals with generous Super Luminova are a highlight, and one owner found the double AR-coated mineral crystal surprisingly scratch-free. However, the lume is not very bright or long-lasting, and the mechanical version requires about 60 crown turns to fully wind. Some owners find the rotating bezel's detents unremarkable, and the mineral crystal can scratch more easily than sapphire, though this is considered a minor drawback given the price. On balance, owners rate the Hamilton Khaki Aviation Pilot Pioneer highly for its vintage appeal and quality build at the price point.

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.

At a glance

13 of 29 specs differ
Diameter
Khaki Aviation Pilot Pioneer38mm
5 Sports Field series39.4mm
Power Reserve
Khaki Aviation Pilot Pioneer80h
5 Sports Field series41h
Water Resistance
Khaki Aviation Pilot Pioneer100m
5 Sports Field series100m
MSRP
Khaki Aviation Pilot Pioneer$1,095
5 Sports Field series$450

Full specifications

Case

5 specs
Category
Pilot
GMT
Diameter
38mm
39.4mm
Thickness
11.4mm
13.6mm
Lug-to-Lug
0mm
47.9mm
Lug Width
18mm
20mm

Crystal & Dial

4 specs
Crystal
Sapphire
Hardlex
Crystal Shape
Curved
Dial Color
Black
Lume
None
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
H-10
4R34
Power Reserve
80h
41h
Jewels
0
24

Pricing

1 specs
MSRP
$1,095
$450
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