Which is bigger, the Redux Zero-Hour or the Tudor Black Bay?

The Tudor Black Bay wears larger at 41mm versus 39mm for the Redux Zero-Hour — a 2mm difference across the dial.

Which has a longer power reserve, the Redux Zero-Hour or the Tudor Black Bay?

The Tudor Black Bay carries a 70-hour power reserve against 41 hours on the Redux Zero-Hour.

What movement does the Redux Zero-Hour run compared to the Tudor Black Bay?

Both watches run automatic movements — the Redux Zero-Hour uses the Seiko NH35 and the Tudor Black Bay uses the MT5602.

Side by side

Redux Zero-HourvsTudor Black Bay

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

Tudor Black Bay

m79230g-0001

At a glance

10 of 29 specs differ

Diameter

Zero-Hour39mm

Black Bay41mm

Power Reserve

Zero-Hour41h

Black Bay70h

Water Resistance

Zero-Hour200m

Black Bay200m

MSRP

Zero-Hour—

Black Bay—

Full specifications

Case

8 specs

Movement

2 specs

Caliber

Seiko NH35

MT5602

Power Reserve

41h

70h

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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 Type 39MM for its robust, no-nonsense design and good overall quality, with a reliable Seiko NH53A movement keeping time well. The titanium case and crystal have shown scratch resistance, and the bezel action is described as tight by some. Reviewers note the proprietary RDXB1 or blue lume glows brilliantly, though briefly. Some owners flag the crown stem as flimsy and the unidirectional bezel as having some play. Overall, owners rate the Redux Courg Type 39MM highly for its functional tool-watch design and durable titanium construction.

Reddit·2

WatchUSeek

Tudor Black Bay

Owners widely praise the Tudor Black Bay for its comfortable wearability, robust build, and vintage-inspired aesthetics, with specific mentions of its satisfying winding feel and sturdy bezel action. Reviewers highlight the 39mm Black Bay 58's comfortable size and thinness, while others note the 41mm Master Chronometer's reliable timekeeping and magnetic resistance. Some owners find the GMT hand difficult to distinguish in low light. A recurring point of contention across multiple sources is the lack of on-the-fly micro-adjustment on the bracelet, though some find aftermarket solutions adequate. One owner reported the watch losing two minutes a day after six years, requiring a service. Overall, owners and reviewers rate the Tudor Black Bay highly for its blend of vintage charm, modern robustness, and comfortable wearability.

From video reviewers

The COSC-certified accuracy of the movement is a notable strength. The 14.7mm to 14.8mm thickness is cited as a potential drawback. Reviewers are divided on whether the newer models represent a departure from the Black Bay's heritage design.

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