Side by side

Maen Grand Tonneau Ultra ThinvsSeiko Monster

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
Monster
SeikoMonster
MSRP $550

At a glance

14 of 29 specs differ
Diameter
Grand Tonneau Ultra Thin34mm
Monster42.4mm
Power Reserve
Grand Tonneau Ultra Thin40h
Monster41h
Water Resistance
Grand Tonneau Ultra Thin50m
Monster200m
MSRP
Grand Tonneau Ultra Thin$1,519
Monster$550

Full specifications

Case

7 specs
Category
Dress
Diver
Diameter
34mm
42.4mm
Thickness
6.4mm
13.4mm
Lug-to-Lug
49.4mm
Lug Width
20mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
50m
200m

Crystal & Dial

3 specs
Crystal
Sapphire
Hardlex
Dial Color
MNL.04
Black
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
4R36
Power Reserve
40h
41h
Jewels
25
24

Pricing

1 specs
MSRP
$1,519
$550

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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.

Seiko Monster

Owners widely praise the Seiko Prospex Sea for its excellent value, robust build, and superb lume, with many noting its comfortable wearability. Reviewers consistently highlight its impressive finishing and classic dive watch design, often comparing it favorably to older models. Some owners find the size substantial, with one noting it as big, thick, and heavy on a 6.5-inch wrist, while others find it perfect. On balance, owners and reviewers rate the Seiko Prospex Sea highly for its exceptional value and robust, classic dive watch design.

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