Side by side

Bremont Supermarine 300MvsSeiko Coutura

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

Supermarine 300M
BremontSupermarine 300M
MSRP $3,550
Coutura
SeikoCoutura
MSRP $625

At a glance

13 of 29 specs differ
Diameter
Supermarine 300M40mm
Coutura45.3mm
Power Reserve
Supermarine 300M40h
Coutura40h
Water Resistance
Supermarine 300M300m
Coutura100m
MSRP
Supermarine 300M$3,550
Coutura$625

Full specifications

Case

7 specs
Category
Diver
GMT
Diameter
40mm
45.3mm
Thickness
12mm
11.5mm
Lug-to-Lug
46mm
Lug Width
20mm
12mm
Material
904L Stainless Steel
Stainless Steel
Water Resistance
300m
100m

Crystal & Dial

2 specs
Dial Color
Green
Black
Lume
None
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
BE-92AE
8B92
Type
Automatic
Quartz
Jewels
25
10

Pricing

1 specs
MSRP
$3,550
$625

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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.

Bremont Supermarine 300M

The Bremont Supermarine 300M is praised for its comfortable 40mm and 42mm case sizes, with owners noting the 42mm wears well on smaller wrists due to its lug design. One owner highlights the 13mm thinness of the 40mm case, considered compact for a 300m diver. The watch is priced at $1375. On balance, owners and reviewers appreciate the Bremont Supermarine 300M for its wearability and compact dimensions, especially for a dive watch.

Seiko Coutura

Owners widely report the Seiko Coutura's metal treatments are very wear-resistant, with one owner noting minimal scratching after six years. Reviewers and owners appreciate its solar-powered movement, perpetual calendar, and radio sync features, with some finding its unique, futuristic styling captivating and a great value, while others describe the dial as too busy or gaudy. Some owners find the watch large and complicated to set initially, and one owner experienced issues with the solar power reserve requiring constant light exposure. On balance, owners and reviewers rate the Seiko Coutura well for its durable construction and practical solar and perpetual calendar features, despite polarizing design opinions.

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