Side by side

Bremont Supermarine 300MvsGrand Seiko SBGR299

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

Supermarine 300M
BremontSupermarine 300M
MSRP $3,550
SBGR299
Grand SeikoSBGR299
MSRP $4,300

At a glance

12 of 29 specs differ
Diameter
Supermarine 300M40mm
SBGR29942mm
Power Reserve
Supermarine 300M40h
SBGR29972h
Water Resistance
Supermarine 300M300m
SBGR299100m
MSRP
Supermarine 300M$3,550
SBGR299$4,300

Full specifications

Case

7 specs
Category
Diver
Dress
Diameter
40mm
42mm
Thickness
12mm
13.1mm
Lug-to-Lug
47.9mm
Lug Width
20mm
21mm
Material
904L Stainless Steel
Stainless Steel
Water Resistance
300m
100m

Crystal & Dial

2 specs
AR Coating
Inner
Yes
Dial Color
Green
Black

Movement

2 specs
Caliber
BE-92AE
9S61
Power Reserve
40h
72h

Pricing

1 specs
MSRP
$3,550
$4,300

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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 SBGR299

Owners widely praise the Grand Seiko SBGR299 for its striking blue second hand, silver rhodium dial, no-date design, and the impressive 72-hour power reserve, noting its excellent value. The watch's high polish finishing is frequently described as outstanding, akin to a polished samurai sword. Some owners express concern over legibility due to silver hands on a silver dial, though this is not a universal sentiment. One owner reported accuracy of approximately -20 seconds per day, while another found the 42mm case size wearable. The pre-owned price is noted around $3,399.00. Overall, owners rate the Grand Seiko SBGR299 highly for its exceptional finishing and distinctive design elements at its price point.

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