Side by side

Bremont Supermarine 300MvsCWC E9 Automatic Diver Watch

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

Supermarine 300M
BremontSupermarine 300M
MSRP $3,550
E9 Automatic Diver Watch
CWCE9 Automatic Diver Watch
MSRP $1,391

At a glance

7 of 29 specs differ
Diameter
Supermarine 300M40mm
E9 Automatic Diver Watch41mm
Power Reserve
Supermarine 300M40h
E9 Automatic Diver Watch40h
Water Resistance
Supermarine 300M300m
E9 Automatic Diver Watch300m
MSRP
Supermarine 300M$3,550
E9 Automatic Diver Watch$1,391

Full specifications

Case

3 specs
Diameter
40mm
41mm
Lug-to-Lug
47mm
Material
904L Stainless Steel
Stainless Steel

Crystal & Dial

2 specs
Dial Color
Green
CWC E9 Automatic Diver Watch (SF300-E9 AS120)
Lume
None
Super-LumiNova

Movement

1 specs
Caliber
BE-92AE
Sellita SW200-1

Pricing

1 specs
MSRP
$3,550
$1,391

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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.

CWC E9 Automatic Diver Watch

Owners widely praise the CWC E9 Automatic Diver Watch for its military-spec toughness and satisfyingly easy-to-wind crown, with one owner calling it a perfect reissue due to its thin case, small size, and legibility. Some owners appreciate its durability and value as a beater or summer watch, noting its solid bars are a military requirement and highlighting its significant wrist presence and unique "Jolly Roger" dial design. Critics find the CWC E9 Automatic Diver Watch overpriced for its mineral crystal and 60-click bezel, despite its military heritage and HAQ movement, and its luminous paint is noted as low glow. Overall, owners rate the CWC E9 Automatic Diver Watch highly for its military-spec toughness and wrist presence, despite some reservations about its value proposition.

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