Side by side

Gruppo Gamma Vanguard SteelvsSeiko 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.

Gruppo Gamma Vanguard Steel

The Gruppo Gamma Vanguard Steel is praised for its aged steel case and cream sandwich dial. However, some owners dislike the distorted sapphire crystal and the absence of minute markers, with one noting difficulty in replacing the crystal due to hand fitment. The watch features a Miyota 9039 movement with a 42-hour power reserve and an accuracy range of -10 to +30 seconds per day, and is offered with two strap options. On balance, owners value the Gruppo Gamma Vanguard Steel for its distinctive aged aesthetic and dial design, despite some reservations about the crystal.

From video reviewers

Movement accuracy is a notable strength, with one reviewer noting a -1.8 second per day deviation after initial testing. A weakness is the substantial price hike for the re-release model, which raises questions about whether the upgrades justify the cost. Reviewers disagree on the watch's originality, with one calling it "decidedly derivative" and the other not mentioning this aspect.

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

14 of 29 specs differ
Diameter
Vanguard Steel42mm
5 Sports Field series39.4mm
Power Reserve
Vanguard Steel42h
5 Sports Field series41h
Water Resistance
Vanguard Steel100m
5 Sports Field series100m
MSRP
Vanguard Steel$790
5 Sports Field series$450

Full specifications

Case

5 specs
Category
GMT
Diameter
42mm
39.4mm
Thickness
12.6mm
13.6mm
Lug-to-Lug
49.5mm
47.9mm
Lug Width
22mm
20mm

Crystal & Dial

5 specs
Crystal
Sapphire
Hardlex
Crystal Shape
Curved
AR Coating
Yes
Dial Color
Forged Carbon
Lume
Super-LumiNova
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
Miyota 9039
4R34
Power Reserve
42h
41h
Jewels
0
24

Pricing

1 specs
MSRP
$790
$450
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