Side by side

Citizen Atomic Perpetual A-TvsRedux Zero-Hour

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

Zero-Hour
ReduxZero-Hour

At a glance

10 of 29 specs differ
Diameter
Atomic Perpetual A-T41mm
Zero-Hour39mm
Power Reserve
Atomic Perpetual A-T40h
Zero-Hour41h
Water Resistance
Atomic Perpetual A-T200m
Zero-Hour200m
MSRP
Atomic Perpetual A-T
Zero-Hour

Full specifications

Case

5 specs
Category
Pilot
Diameter
41mm
39mm
Thickness
12mm
13.7mm
Lug-to-Lug
46mm
46.6mm
Material
Stainless Steel
Titanium

Crystal & Dial

2 specs
AR Coating
Underside
Inner
Dial Color
Blue
Black

Movement

3 specs
Caliber
H800
Seiko NH35
Type
Solar
Automatic
Power Reserve
40h
41h

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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 Atomic Perpetual A-T

Owners widely praise the Citizen Atomic Perpetual A-T for its handsome appearance, solid fit and finish, comfortable bracelet, and intuitive world time function. Its perpetual calendar and atomic timekeeping are highlighted as major conveniences, maintaining accuracy within 0.5 seconds even without syncing, and owners appreciate its "set & forget" nature and solar charging. The watch features a modest, stylish blue dial with delicate design details and a clutter-free layout, along with high water resistance without a screw-down crown and light titanium construction. Some find the dial unnecessarily busy, and its time zone functionality is noted as less useful outside the US, with atomic sync being less compelling below the equator. Accuracy is reported as +/-15 seconds per month if not syncing, but +/-0 seconds if it syncs via radio signal. Some find the watch a bit on the large side.

Redux Zero-Hour

Owners widely praise the Redux Courg Zero Hour 39MM for its robust, utilitarian design inspired by pilot and dive tools, its lightweight Grade 5 titanium construction, and its comfortable wearability. The proprietary RDXB1 lume is noted for its bright initial glow, though it fades quickly. The Seiko NH53A or NH35 movement is generally considered reliable. However, multiple owners report a flimsy or fragile crown stem, and some describe the unidirectional bezel as having play or being able to rotate clockwise by one minute, though one owner reported a tight bezel with no play. The 39mm case size is considered good by some, while others find it small for larger wrists or note it looks large, with some desiring a 42mm option. One owner found the titanium finish looked slightly cheap and wished for a bezel insert. The dial is described by one owner as too busy for easy reading without glasses. The Redux Courg Zero Hour 39MM is available for $300, down from an original price of $507.

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