Side by side

Maen Grand Tonneau Ultra ThinvsTudor Black Bay One 31

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

Grand Tonneau Ultra Thin
MaenGrand Tonneau Ultra Thin
MSRP $1,519
Black Bay One 31
TudorBlack Bay One 31
MSRP $4,600

At a glance

13 of 29 specs differ
Diameter
Grand Tonneau Ultra Thin34mm
Black Bay One 3131mm
Power Reserve
Grand Tonneau Ultra Thin40h
Black Bay One 3150h
Water Resistance
Grand Tonneau Ultra Thin50m
Black Bay One 31100m
MSRP
Grand Tonneau Ultra Thin$1,519
Black Bay One 31$4,600

Full specifications

Case

9 specs
Category
Dress
Diver
Diameter
34mm
31mm
Thickness
6.4mm
9.5mm
Lug-to-Lug
46mm
Lug Width
17mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed and polished
Polished + Satin
Water Resistance
50m
100m
Caseback
Solid
Solid screw-down

Crystal & Dial

1 specs
Dial Color
MNL.04
Anthracite

Movement

2 specs
Caliber
MT5201
Power Reserve
40h
50h

Pricing

1 specs
MSRP
$1,519
$4,600

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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.

Maen Grand Tonneau Ultra Thin

Owners widely report the Maen Grand Tonneau Ultra Thin features a La Joux-Perret D101 manual-wind movement and a double-layer enamel dial. Some owners criticize the bracelet design and find the dial too small and lacking indices. One owner describes the Maen Grand Tonneau Ultra Thin as "hideous with a good movement." On balance, owners are divided on the Maen Grand Tonneau Ultra Thin, with some appreciating its movement and dial while others find its design unappealing.

Tudor Black Bay One 31

Owners widely report the Tudor Black Bay One 31's polished case and bracelet scratch easily, though its wearability under gloves and robust movement are praised. Some desire more micro-adjustment options on the clasp, and a lack of contrast between the silver dial and hands is noted. The 31mm size may be a consideration for daily wear due to its 50-hour power reserve. On balance, owners and reviewers appreciate the Tudor Black Bay One 31 for its comfortable wearability and robust movement, despite concerns about case scratching and clasp adjustability.

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