Side by side

Bremont ionBirdvsFortis Marinemaster M-40

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

ionBird
BremontionBird
MSRP $5,800
Marinemaster M-40
FortisMarinemaster M-40
MSRP $3,520

At a glance

11 of 29 specs differ
Diameter
ionBird43mm
Marinemaster M-4040mm
Power Reserve
ionBird40h
Marinemaster M-4038h
Water Resistance
ionBird
Marinemaster M-40300m
MSRP
ionBird$5,800
Marinemaster M-40$3,520

Full specifications

Case

6 specs
Category
Pilot
Diver
Diameter
43mm
40mm
Thickness
13mm
Lug Width
21mm
Material
Titanium
Stainless Steel
Water Resistance
300m

Crystal & Dial

1 specs
Dial Color
Regular length (15cm - 19cm wrist size)
Orange

Movement

3 specs
Caliber
Sellita SW220-1
Power Reserve
40h
38h
Jewels
25
26

Pricing

1 specs
MSRP
$5,800
$3,520

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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.

Fortis Marinemaster M-40

Owners praise the Fortis Amber Orange for its gorgeous appearance and strong wrist presence, noting its crazy lume and 70-hour power reserve. The Doxa SUB 300T, described as having a superb, eccentric design with a highly legible dial and functional no-decompression bezel, uses an ETA 2824-2 movement. However, the SUB 300T's 42.5mm case wears large and its 14mm thickness is not ideal for dress shirts, though it boasts 1,200m water resistance. On balance, owners appreciate the Fortis Amber Orange for its striking aesthetics and impressive lume.

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