Which is bigger, the Redux Zero-Hour or the Gruppo Gamma Field III?

The Gruppo Gamma Field III wears larger at 40mm versus 39mm for the Redux Zero-Hour — a 1mm difference across the dial.

Which has a longer power reserve, the Redux Zero-Hour or the Gruppo Gamma Field III?

The Gruppo Gamma Field III carries a 41-hour power reserve against 41 hours on the Redux Zero-Hour.

What movement does the Redux Zero-Hour run compared to the Gruppo Gamma Field III?

Both watches run automatic movements — the Redux Zero-Hour uses the Seiko NH35 and the Gruppo Gamma Field III uses the Seiko Instruments NH38A.

Side by side

Redux Zero-HourvsGruppo Gamma Field III

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

Redux Zero-Hour

the-courg-watch-zero-hour-39mm

Gruppo Gamma Field III

venturo-field-iii-black

MSRP $439

At a glance

11 of 29 specs differ

Diameter

Zero-Hour39mm

Field III40mm

Power Reserve

Zero-Hour41h

Field III41h

Water Resistance

Zero-Hour200m

Field III200m

MSRP

Zero-Hour—

Field III$439

Full specifications

Case

6 specs

Crystal & Dial

2 specs

AR Coating

Inner

Yes

Lume

None

Super-LumiNova

Movement

2 specs

Caliber

Seiko NH35

Seiko Instruments NH38A

Power Reserve

41h

Pricing

1 specs

MSRP

—

$439

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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.

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.

Reddit·7

WatchUSeek·3

Gruppo Gamma Field III

The watch's 200m water resistance is a notable strength. A weakness is the use of the Seiko NH34A GMT movement, which might be considered less desirable than some other options due to its relatively lower grade compared to other movements in this price range.

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