Side by side

Bremont Supermarine 300MvsGrand Seiko SBGV245

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

Supermarine 300M
BremontSupermarine 300M
MSRP $3,550
SBGV245
Grand SeikoSBGV245
MSRP $3,000
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 SBGV245

Grand Seiko SBGV245 owners widely praise its exceptional case finishing with mixed polishing and brushing, faceted indices, sharp hands, and matte dial, noting its robust tool-watch specifications including 200m water resistance, anti-magnetism, and Lumibrite. The 9F82 quartz movement is lauded for its precision, accurate to +/- 10 seconds per year, offering a refined, set-it-and-forget-it experience with carefree maintenance. Some owners report the Zaratsu polished surfaces and sharp bezel are prone to dings and scratches, and one notes the second hand does not perfectly align with the markers. This JDM-exclusive Grand Seiko SBGV245 is rarely available and commands a high price even on the resale market. Overall, owners rate the Grand Seiko SBGV245 highly for its exceptional finishing and technical innovation at a competitive price point.

From video reviewers

The 9F Quartz movement is a high-precision quartz movement with a 50-year lifespan. The watch's exceptional finishing is another level, with reviewers praising its high-quality craftsmanship. The watch's lug width of 20mm might be a drawback for those with smaller wrists or limited strap options, and the lume brightness is somewhat lacking.

At a glance

9 of 29 specs differ
Diameter
Supermarine 300M40mm
SBGV24540mm
Power Reserve
Supermarine 300M40h
SBGV24540h
Water Resistance
Supermarine 300M300m
SBGV245200m
MSRP
Supermarine 300M$3,550
SBGV245$3,000

Full specifications

Case

4 specs
Thickness
12mm
11.8mm
Lug-to-Lug
47.1mm
Material
904L Stainless Steel
Stainless Steel
Water Resistance
300m
200m

Crystal & Dial

2 specs
AR Coating
Inner
Yes
Dial Color
Green
Black

Movement

2 specs
Caliber
BE-92AE
9F82
Type
Automatic
Quartz

Pricing

1 specs
MSRP
$3,550
$3,000
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