Side by side

Oris Great Barrier Reef Limited Edition IVvsLongines HYDROCONQUEST GMT

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
HYDROCONQUEST GMT
LonginesHYDROCONQUEST GMT
MSRP $3,350

At a glance

16 of 29 specs differ
Diameter
Great Barrier Reef Limited Edition IV43.5mm
HYDROCONQUEST GMT43mm
Power Reserve
Great Barrier Reef Limited Edition IV120 hoursh
HYDROCONQUEST GMT72h
Water Resistance
Great Barrier Reef Limited Edition IV300m
HYDROCONQUEST GMT300m
MSRP
Great Barrier Reef Limited Edition IV$4,750
HYDROCONQUEST GMT$3,350

Full specifications

Case

6 specs
Diameter
43.5mm
43mm
Thickness
12.9mm
Lug-to-Lug
52mm
Lug Width
23mm
22mm
Finish
Brushed and polished
Caseback
Solid

Crystal & Dial

4 specs
Crystal Shape
Flat
AR Coating
Underside
Inner
Dial Color
Blue
Green
Indices
Applied

Movement

5 specs
Caliber
CALIBRE 400
L844.5
Beat Rate
4 vph
28,800 vph
Power Reserve
120 hoursh
72h
Jewels
21
25
Complications
Date
None

Pricing

1 specs
MSRP
$4,750
$3,350

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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.

Longines HYDROCONQUEST GMT

The Longines HYDROCONQUEST GMT is widely praised for its excellent finishing, with some comparing it favorably to higher-end dive watches, and its attractive blue sunburst dial. Owners note its practical true GMT complication and robust 41mm brushed case with ceramic bezel, powered by a movement offering a 72-hour power reserve. Some in the community find the round markers at 6 and 9 disrupt dial symmetry, though others appreciate this design element. A common criticism is the difficulty in reading the tiny GMT text beneath the hour markers, and the absence of a quick date adjust feature. One owner reported a sharp feeling on the bracelet's clasp, and another flagged mismatched date wheel colors on certain dial variants. Overall, owners and reviewers consider the Longines HYDROCONQUEST GMT a strong value proposition for a traveler's dive watch, citing its build quality and GMT functionality as key strengths.

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