Side by side

Seiko 5 Sports Field seriesvsUndone Aero Commando

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.

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.

Undone Aero Commando

The Undone Aero Commando earns consistent praise for its vintage aviator aesthetic and finishing quality at its price point. Reviewers highlight the fashionable P.V.H. Weems-inspired design, the distinctive rotating bezel with 60-second scale and screw-down lock, the chamfered lugs with sharp finishing, and the super-domed polycarbonate crystal that delivers an attractive retro look—though polycarbonate scratches more easily than mineral glass. The comfortable Italian leather strap and well-proportioned case shape drew extended wear approval from one reviewer, who found no faults across weeks of use. The Cordura strap variant is noted as initially stiff, and the Lexan crystal can reflect light. Priced at $365 USD (€354), it pairs the Seiko NH35 automatic movement with 100m water resistance and quick-release spring bars. Overall, reviewers rate the Aero Commando highly for its thoughtful vintage design execution and case finishing quality relative to its cost.

At a glance

13 of 29 specs differ
Diameter
5 Sports Field series39.4mm
Aero Commando40mm
Power Reserve
5 Sports Field series41h
Aero Commando
Water Resistance
5 Sports Field series100m
Aero Commando100m
MSRP
5 Sports Field series$450
Aero Commando$365

Full specifications

Case

5 specs
Category
GMT
Diameter
39.4mm
40mm
Thickness
13.6mm
0mm
Lug-to-Lug
47.9mm
0mm
Lug Width
20mm
0mm

Crystal & Dial

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

Movement

3 specs
Caliber
4R34
Seiko NH35
Power Reserve
41h
Jewels
24
0

Pricing

1 specs
MSRP
$450
$365
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