Side by side

Seiko Prospex SeavsGruppo Gamma Field III

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

Prospex Sea
SeikoProspex Sea
MSRP $625
Field III
Gruppo GammaField III
MSRP $439

At a glance

10 of 29 specs differ
Diameter
Prospex Sea43.8mm
Field III40mm
Power Reserve
Prospex Sea41h
Field III41h
Water Resistance
Prospex Sea200m
Field III200m
MSRP
Prospex Sea$625
Field III$439

Full specifications

Case

4 specs
Category
Diver
Field
Diameter
43.8mm
40mm
Thickness
12.8mm
14mm
Lug-to-Lug
48.7mm
48.5mm

Crystal & Dial

2 specs
AR Coating
Anti-reflective coating on inner surface
Yes
Lume
LumiBrite on hands, index(es) and bezel
Super-LumiNova

Movement

3 specs
Caliber
4R35
Seiko Instruments NH38A
Power Reserve
41h
41h
Jewels
23
25

Pricing

1 specs
MSRP
$625
$439

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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.

Seiko Prospex Sea

The Seiko Prospex Sea is widely praised for its excellent value, solid build quality, and comfortable wearability, with many models featuring impressive lume and attractive dials. Owners and reviewers highlight the modern upgrades on classic designs, such as drilled lugs and reliable movements with hacking and hand-winding capabilities. Some models are noted for their refined case finishing and scratch resistance. Accuracy figures vary, with one owner reporting approximately 4 seconds fast per day, while others find the movements offer good performance for the price. Concerns raised by owners and reviewers include clasps that can feel generic or cheap, and lug widths that some find disproportionate to the case size on certain models. The thickness and weight of some Prospex Sea watches are also noted as substantial. The GMT function on specific models is considered secondary and difficult to read for true travel purposes.

Gruppo Gamma Field III

The watch's 200m water resistance is a notable strength. A weakness is the use of the Seiko NH34A GMT movement, which might be considered less desirable than some other options due to its relatively lower grade compared to other movements in this price range.

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