Side by side

Bremont Supermarine 300MvsGrand Seiko SLGC009

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

Supermarine 300M
BremontSupermarine 300M
MSRP $3,550
SLGC009
Grand SeikoSLGC009
MSRP $16,900

At a glance

12 of 29 specs differ
Diameter
Supermarine 300M40mm
SLGC00943mm
Power Reserve
Supermarine 300M40h
SLGC00972h
Water Resistance
Supermarine 300M300m
SLGC009200m
MSRP
Supermarine 300M$3,550
SLGC009$16,900

Full specifications

Case

7 specs
Category
Diver
Chronograph
Diameter
40mm
43mm
Thickness
12mm
15.6mm
Lug-to-Lug
50mm
Lug Width
20mm
23mm
Material
904L Stainless Steel
Titanium
Water Resistance
300m
200m

Crystal & Dial

2 specs
AR Coating
Inner
Yes
Dial Color
Green
Black

Movement

2 specs
Caliber
BE-92AE
9SC5
Power Reserve
40h
72h

Pricing

1 specs
MSRP
$3,550
$16,900

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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.

Grand Seiko SLGC009

Owners widely report the Grand Seiko SLGC009 is perceived as "big" but "not obnoxious," with some finding its bold, aggressive, and futuristic design appealing while others deem it too daring for the brand. Opinions are split on its aesthetic, with comparisons ranging from a G-Shock to the Cybertruck. One owner noted a desire for a more offset clasp. The movement is praised by some, though the dial color and hour indexes drew criticism from one voice. The Grand Seiko SLGC009's rumored discontinuation is speculated to potentially aid in value retention. On balance, owners are divided on the Grand Seiko SLGC009's polarizing design, with its movement and wearability being points of discussion.

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