Side by side

Bremont ionBirdvsTissot Gentleman Open Heart

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

ionBird
BremontionBird
MSRP $5,800
Gentleman Open Heart
TissotGentleman Open Heart
MSRP $1,025

At a glance

14 of 29 specs differ
Diameter
ionBird43mm
Gentleman Open Heart40mm
Power Reserve
ionBird40h
Gentleman Open Heart80h
Water Resistance
ionBird
Gentleman Open Heart100m
MSRP
ionBird$5,800
Gentleman Open Heart$1,025

Full specifications

Case

7 specs
Category
Pilot
Chronograph
Diameter
43mm
40mm
Thickness
11.5mm
Lug-to-Lug
40mm
Lug Width
21mm
Material
Titanium
Stainless Steel
Water Resistance
100m

Crystal & Dial

5 specs
Crystal Shape
Flat
Domed
AR Coating
Inner
Yes
Dial Color
Regular length (15cm - 19cm wrist size)
Silver
Indices
Applied
Indexes
Lume
None
Super-LumiNova ®

Movement

1 specs
Power Reserve
40h
80h

Pricing

1 specs
MSRP
$5,800
$1,025

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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.

Tissot Gentleman Open Heart

Owners widely praise the Tissot Gentleman Open Heart for its versatile dressy-sporty aesthetic and elegant sunburst dial finish, with one owner preferring its less shiny blue dial compared to other versions. The watch offers excellent fit and bracelet adjustability, and its modified Powermatic 80 movement achieves COSC-level accuracy of -3 to +5 seconds/day, though the seconds hand movement is slightly less smooth at 6 movements per second. However, one owner reported the watch arrived non-functional, requiring a return due to an inoperable movement. On balance, owners rate the Tissot Gentleman Open Heart highly for its aesthetic appeal and accurate timekeeping, despite a reported instance of a faulty movement.

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