Side by side

Seiko Prospex Sea 1965 Heritage Diver's WatchvsGruppo Gamma Field III GMT Date

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

Field III GMT Date
Gruppo GammaField III GMT Date
MSRP $459
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 1965 Heritage Diver's Watch

The Seiko Prospex Sea 1965 Heritage Diver's Watch is praised for its refined engineering and updated features, including a 300m water resistance and a 72-hour power reserve from the Caliber 6R55 movement in a 40mm case. Owners note its better build quality and interesting finishing with a mix of polished and brushed surfaces. The "Tranquil Teal" variant features a jewel-toned dial with a rippling-water pattern. However, some owners consider the price too high, and concerns exist regarding the accuracy of the 6R movements, with some reporting theirs run slow. One review notes a reflective dial that impacts legibility. On balance, owners and reviewers appreciate the Seiko Prospex Sea 1965 Heritage Diver's Watch for its refined design and improved specifications over previous generations, despite some reservations about movement accuracy and price.

Gruppo Gamma Field III GMT Date

Owners widely praise the Gruppo Gamma Field III GMT Date for its awesome looks, quality, and good value. The watch features a 40mm brushed 316L stainless steel case, box sapphire crystal, and 200m water resistance, powered by a Seiko NH34A movement. Some reviewers note the NH34A movement's accuracy can range from -20~+40 seconds per day, though one reviewer reported +5 seconds per day with a regulated movement. The dial's dense layout with Arabic numerals can be overwhelming for some, and one owner found the size unsuitable for smaller wrists. On balance, owners rate the Gruppo Gamma Field III GMT Date highly for its impressive finishing and toolish design at its price point.

At a glance

13 of 29 specs differ
Diameter
Prospex Sea 1965 Heritage Diver's Watch40mm
Field III GMT Date40mm
Power Reserve
Prospex Sea 1965 Heritage Diver's Watch72h
Field III GMT Date41h
Water Resistance
Prospex Sea 1965 Heritage Diver's Watch300m
Field III GMT Date200m
MSRP
Prospex Sea 1965 Heritage Diver's Watch$1,300
Field III GMT Date$459

Full specifications

Case

5 specs
Category
Diver
GMT
Thickness
13mm
14mm
Lug-to-Lug
46.4mm
48.5mm
Lug Width
20mm
22mm
Water Resistance
300m
200m

Crystal & Dial

3 specs
Crystal Shape
Curved
Flat
AR Coating
Anti-reflective coating on inner surface
Yes
Lume
LumiBrite on hands, index(es) and bezel
Super-LumiNova

Movement

4 specs
Caliber
6R55
Seiko Instruments NH38A
Power Reserve
72h
41h
Jewels
24
25
Complications
None
GMT, Date

Pricing

1 specs
MSRP
$1,300
$459
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