Side by side

Bremont Supermarine 300MvsMarathon GPQ (General Purpose Quartz) Field Watch

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

Supermarine 300M
BremontSupermarine 300M
MSRP $3,550
GPQ (General Purpose Quartz) Field Watch
MarathonGPQ (General Purpose Quartz) Field Watch
MSRP $420

At a glance

12 of 29 specs differ
Diameter
Supermarine 300M40mm
GPQ (General Purpose Quartz) Field Watch34mm
Power Reserve
Supermarine 300M40h
GPQ (General Purpose Quartz) Field Watch40h
Water Resistance
Supermarine 300M300m
GPQ (General Purpose Quartz) Field Watch30m
MSRP
Supermarine 300M$3,550
GPQ (General Purpose Quartz) Field Watch$420

Full specifications

Case

7 specs
Category
Diver
Field
Diameter
40mm
34mm
Thickness
12mm
11.5mm
Lug-to-Lug
41mm
Lug Width
20mm
16mm
Material
904L Stainless Steel
Fibreshell Composite
Water Resistance
300m
30m

Crystal & Dial

2 specs
Crystal
Sapphire
Acrylic
Dial Color
Green
Black

Movement

2 specs
Caliber
BE-92AE
Swiss High-Torque Quartz (3J, EOL)
Type
Automatic
Quartz

Pricing

1 specs
MSRP
$3,550
$420

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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.

Marathon GPQ (General Purpose Quartz) Field Watch

Owners widely praise the Marathon GPQ (General Purpose Quartz) Field Watch for its rugged quartz movement, accuracy, and tritium lume. Reviewers and owners alike highlight its solid build, legibility, and comfortable, lightweight wear, making it particularly well-suited for smaller wrists. Some owners, however, consider the price point of $350-420 to be somewhat high. On balance, the consensus is that owners rate the Marathon GPQ (General Purpose Quartz) Field Watch highly for its dependable quartz accuracy and excellent tritium lume.

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