Side by side

Seiko Prospex Sea 1968 Heritage Diver's GMT WatchvsGruppo Gamma Field III

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

Field III
Gruppo GammaField III
MSRP $439

At a glance

12 of 29 specs differ
Diameter
Prospex Sea 1968 Heritage Diver's GMT Watch42mm
Field III40mm
Power Reserve
Prospex Sea 1968 Heritage Diver's GMT Watch72h
Field III41h
Water Resistance
Prospex Sea 1968 Heritage Diver's GMT Watch300m
Field III200m
MSRP
Prospex Sea 1968 Heritage Diver's GMT Watch$1,700
Field III$439

Full specifications

Case

6 specs
Category
Diver
Field
Diameter
42mm
40mm
Thickness
13.3mm
14mm
Lug-to-Lug
48.6mm
48.5mm
Lug Width
20mm
22mm
Water Resistance
300m
200m

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
6R54
Seiko Instruments NH38A
Power Reserve
72h
41h
Jewels
24
25

Pricing

1 specs
MSRP
$1,700
$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 1968 Heritage Diver's GMT Watch

The Seiko Prospex Sea 1968 Heritage Diver's GMT Watch offers a 300-meter depth rating and a caller-style GMT complication powered by the Caliber 6R54 movement, which provides a 72-hour power reserve. Reviewers note its refined clasp with extensive micro-adjustment. However, the movement's accuracy, ranging from +25 to -15 seconds per day, is considered a drawback by some. Overall, reviewers highlight the Seiko Prospex Sea 1968 Heritage Diver's GMT Watch as a good reminder of Seiko's value, despite the wide accuracy range of its movement.

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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