Side by side

Tissot Gentleman Open HeartvsZelos Hammerhead V3 300m Titanium

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

Gentleman Open Heart
TissotGentleman Open Heart
MSRP $1,025
Hammerhead V3 300m Titanium
ZelosHammerhead V3 300m Titanium
MSRP $559

At a glance

16 of 29 specs differ
Diameter
Gentleman Open Heart40mm
Hammerhead V3 300m Titanium44mm
Power Reserve
Gentleman Open Heart80h
Hammerhead V3 300m Titanium40h
Water Resistance
Gentleman Open Heart100m
Hammerhead V3 300m Titanium300m
MSRP
Gentleman Open Heart$1,025
Hammerhead V3 300m Titanium$559

Full specifications

Case

7 specs
Category
Chronograph
Diver
Diameter
40mm
44mm
Thickness
11.5mm
13mm
Lug-to-Lug
40mm
44mm
Lug Width
21mm
22mm
Material
Stainless Steel
Titanium
Water Resistance
100m
300m

Crystal & Dial

6 specs
Crystal
Sapphire
Domed Sapphire
Crystal Shape
Domed
Flat
AR Coating
Yes
Inner
Dial Color
Silver
Ti - Mosaic MOP
Indices
Indexes
Applied
Lume
Super-LumiNova ®
None

Movement

2 specs
Caliber
Seiko NH35
Power Reserve
80h
40h

Pricing

1 specs
MSRP
$1,025
$559

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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.

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.

Zelos Hammerhead V3 300m Titanium

The Zelos Hammerhead V3 300m Titanium is widely praised for its exceptional lume, unique and beautiful dial finishing that reflects light dramatically, and solid build quality that exceeds its price point. Owners also highlight its comfortable wearability, especially the lightweight titanium variant, and the convenient on-the-fly micro-adjustment on the bracelet. One owner notes the Japanese movement performs better than anticipated, and the Ti-Damascus variant features a unique, patterned dial and bezel. However, some owners find the 44mm size large, the crown "off," and the bracelet clasp could be more scratch-resistant, with resizing pins described as stubborn. Reattaching the bracelet after removal is also noted as extremely difficult. Overall, owners rate the Zelos Hammerhead V3 300m Titanium highly for its impressive dial aesthetics and value for money.

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