Side by side

Citizen Eco-DrivevsZelos Hammerhead V3 300m Titanium

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

Eco-Drive
CitizenEco-Drive
MSRP $338
Hammerhead V3 300m Titanium
ZelosHammerhead V3 300m Titanium
MSRP $559

At a glance

12 of 29 specs differ
Diameter
Eco-Drive42.3mm
Hammerhead V3 300m Titanium44mm
Power Reserve
Eco-Drive40h
Hammerhead V3 300m Titanium40h
Water Resistance
Eco-Drive100m
Hammerhead V3 300m Titanium300m
MSRP
Eco-Drive$338
Hammerhead V3 300m Titanium$559

Full specifications

Case

7 specs
Category
Casual
Diver
Diameter
42.3mm
44mm
Thickness
12mm
13mm
Lug-to-Lug
46mm
44mm
Lug Width
20mm
22mm
Material
Stainless Steel
Titanium
Water Resistance
100m
300m

Crystal & Dial

2 specs
Crystal
Mineral
Domed Sapphire
Dial Color
Green
Ti - Mosaic MOP

Movement

2 specs
Caliber
J800
Seiko NH35
Type
Solar
Automatic

Pricing

1 specs
MSRP
$338
$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.

Citizen Eco-Drive

Citizen Eco-Drive watches are widely praised for exceptional durability and reliability, with many owners reporting theirs lasting over a decade without issue and some even suggesting they are "Buy It For Life" (BIFL) models. Owners appreciate the ease of use and reliability of the solar-powered quartz movement, with one noting their watch was only off by 2 minutes after five years of disuse. Specific models are noted for their engineering marvels, such as the world's thinnest light-powered watch at 2.98mm thick, a 100-day power reserve, and materials like cermet bezels and titanium construction with sapphire crystals. However, a few users have experienced malfunctions, including one chronograph that stopped keeping time shortly after purchase, requiring a lengthy warranty repair. The battery can degrade and may need replacement after 20+ years, and owners suggest keeping the watch charged in light to prolong its life.

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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