Side by side

Bremont ionBirdvsFormex Reef GMT

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

ionBird
BremontionBird
MSRP $5,800
Reef GMT
FormexReef GMT
MSRP $2,235

At a glance

12 of 29 specs differ
Diameter
ionBird43mm
Reef GMT42mm
Power Reserve
ionBird40h
Reef GMT56h
Water Resistance
ionBird
Reef GMT300m
MSRP
ionBird$5,800
Reef GMT$2,235

Full specifications

Case

7 specs
Category
Pilot
GMT
Diameter
43mm
42mm
Thickness
11.4mm
Lug-to-Lug
47mm
Lug Width
22mm
Material
Titanium
Stainless Steel
Water Resistance
300m

Crystal & Dial

2 specs
Dial Color
Regular length (15cm - 19cm wrist size)
Black
Lume
None
Super-LumiNova

Movement

2 specs
Caliber
Sellita SW330-2
Power Reserve
40h
56h

Pricing

1 specs
MSRP
$5,800
$2,235

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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.

Bremont ionBird

Owners report the Bremont ionBird is overpriced and features a printed dial with a poorly placed date window at 4:30, which some find visually disruptive. However, some owners suggest its case finishing is superior to competitors. The 43mm titanium Bremont ionBird GMT is powered by a COSC-certified BE-93-2AV automatic movement and retails for $5,795. On balance, owners and reviewers find the Bremont ionBird's date window placement and price point to be significant drawbacks.

Formex Reef GMT

The Formex Reef GMT is widely praised for its unique porthole case shape, COSC-certified Sellita SW330-2 movement with good finishing, and comfortable quick-release bracelet with on-the-fly micro-adjustment. Reviewers note its robust construction, impressive specifications, and strong value proposition, with a slim 11.4mm profile accommodating 300m water resistance and an exhibition caseback. However, owners widely report the 53mm lug-to-lug span with male endlinks makes it too large for smaller wrists. Some find the bezel action stiff and potentially slippery, and a reviewer desired sharper finishing and edges, deeming the aesthetic too modernist. The GMT variant sacrifices a timing bezel unless swapped, and one owner notes sharp edges on the crown and crown guard. Overall, owners and reviewers highly rate the Formex Reef GMT for its exceptional value and well-executed features, particularly its bracelet system and COSC-certified movement.

From video reviewers

The watch features a COSC-certified SW330-2 GMT movement, which is visible through a sapphire crystal display case back and beautifully decorated. The watch's water-resistance of up to 300m/1000ft is a notable feature. The 42mm diameter may be too large for smaller wrists.

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