Side by side

Oris Great Barrier Reef Limited Edition IVvsFormex Reef 39.5 mm

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
Reef 39.5 mm
FormexReef 39.5 mm
MSRP $2,230

At a glance

17 of 29 specs differ
Diameter
Great Barrier Reef Limited Edition IV43.5mm
Reef 39.5 mm39.5mm
Power Reserve
Great Barrier Reef Limited Edition IV120 hoursh
Reef 39.5 mm56h
Water Resistance
Great Barrier Reef Limited Edition IV300m
Reef 39.5 mm300m
MSRP
Great Barrier Reef Limited Edition IV$4,750
Reef 39.5 mm$2,230

Full specifications

Case

6 specs
Diameter
43.5mm
39.5mm
Thickness
11mm
Lug-to-Lug
45.5mm
Lug Width
23mm
22mm
Finish
Brushed and polished
Caseback
Solid

Crystal & Dial

5 specs
Crystal Shape
Flat
AR Coating
Underside
Inner
Dial Color
Blue
Bahama Blue
Indices
Applied
Lume
None
Super-LumiNova

Movement

5 specs
Caliber
CALIBRE 400
Sellita SW300-1
Beat Rate
4 vph
28,800 vph
Power Reserve
120 hoursh
56h
Jewels
21
25
Complications
Date
None

Pricing

1 specs
MSRP
$4,750
$2,230

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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.

Formex Reef 39.5 mm

The Formex Reef 39.5 mm is widely praised for its refined finishing, comfortable and well-proportioned case design, and impressive specifications for its price point, including COSC-certified Sellita SW300-1 movement and 300m water resistance. Owners and reviewers highlight the tool-less micro-adjust clasp and quick-release spring bars as practical features. Some reviewers note that the 22mm lug width feels slightly disproportionate to the smaller case, and the bracelet could benefit from more taper, though this is a point of contention for some owners who value the overall package. A prototype crown protrusion issue is noted as being addressed for production. On balance, owners and reviewers rate the Formex Reef 39.5 mm highly for its excellent value and well-executed design.

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