Side by side

Oris Great Barrier Reef Limited Edition IVvsSeiko Prospex Sea 1968 Heritage Diver's GMT Watch

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

Great Barrier Reef Limited Edition IV
OrisGreat Barrier Reef Limited Edition IV
MSRP $4,750

At a glance

17 of 29 specs differ
Diameter
Great Barrier Reef Limited Edition IV43.5mm
Prospex Sea 1968 Heritage Diver's GMT Watch42mm
Power Reserve
Great Barrier Reef Limited Edition IV120 hoursh
Prospex Sea 1968 Heritage Diver's GMT Watch72h
Water Resistance
Great Barrier Reef Limited Edition IV300m
Prospex Sea 1968 Heritage Diver's GMT Watch300m
MSRP
Great Barrier Reef Limited Edition IV$4,750
Prospex Sea 1968 Heritage Diver's GMT Watch$1,700

Full specifications

Case

6 specs
Diameter
43.5mm
42mm
Thickness
13.3mm
Lug-to-Lug
48.6mm
Lug Width
23mm
20mm
Finish
Brushed and polished
Caseback
Solid

Crystal & Dial

5 specs
Crystal Shape
Flat
AR Coating
Underside
Anti-reflective coating on inner surface
Dial Color
Blue
Black
Indices
Applied
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

5 specs
Caliber
CALIBRE 400
6R54
Beat Rate
4 vph
28,800 vph
Power Reserve
120 hoursh
72h
Jewels
21
24
Complications
Date
None

Pricing

1 specs
MSRP
$4,750
$1,700

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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.

Oris Great Barrier Reef Limited Edition IV

The Oris Great Barrier Reef Limited Edition IV's 43.55mm case is surprisingly wearable on a 7-inch wrist due to its new design. Owners report the Oris Great Barrier Reef III, a 45mm watch, is massive and nearly 20mm thick. Overall, owners find the Oris Great Barrier Reef Limited Edition IV wearable despite its size, citing its new design as a key factor.

From video reviewers

The striking turquoise-to-navy gradient dial is a notable feature. The 43.5mm stainless steel case is noted for its ergonomic fit.

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.

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