Side by side

Bremont S300vsGrand Seiko SBGR321

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

S300
BremontS300
MSRP $3,795
SBGR321
Grand SeikoSBGR321
MSRP $5,200

At a glance

10 of 29 specs differ
Diameter
S30040mm
SBGR32140mm
Power Reserve
S30040h
SBGR32172h
Water Resistance
S300300m
SBGR321100m
MSRP
S300$3,795
SBGR321$5,200

Full specifications

Case

5 specs
Category
Diver
Dress
Thickness
13mm
Lug-to-Lug
46.6mm
Lug Width
20mm
Water Resistance
300m
100m

Crystal & Dial

2 specs
AR Coating
Inner
Yes
Dial Color
Orange
Black

Movement

2 specs
Caliber
BE-92AE
9S65
Power Reserve
40h
72h

Pricing

1 specs
MSRP
$3,795
$5,200

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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 S300

Owners widely praise the Bremont S300 for its comfortable 40mm size, fitting well under a cuff, and its appealing dial and bezel color. The winding action is described as smooth, and timekeeping averages +3 seconds per day, with machining noted as being on par with higher-end brands. One owner suggests tapering the bracelet and adding a mixed brushing and polishing finish for improved dress-shirt wearability. However, some find its styling lacks uniqueness compared to competitors, and the approximately 49mm lug-to-lug measurement is considered unusually long and potentially ill-fitting on smaller wrists. Overall, owners rate the Bremont S300 highly for its wearability and finishing at its price point.

Grand Seiko SBGR321

Grand Seiko SBGR321 owners and reviewers widely praise its attractive design, compelling dimensions, and robust movement. The watch features sharp case lines with contrasting brushing and polishing, a 40mm steel case that provides presence without bulk, and 100m water resistance. Its sunburst blue dial, inspired by the dawn sky over Mount Iwate, showcases Grand Seiko's signature finishing on applied markers and hands, with a red-tipped seconds hand. The 9S65 automatic movement is noted for its precision, running within specifications, with one source reporting a +5 to -3 seconds a day rate and a 3-day power reserve. A blue rotor with a crimson rim, also inspired by Mount Iwate, is visible through the display caseback. On balance, owners and reviewers rate the Grand Seiko SBGR321 highly for its exceptional finishing and compelling blue dial design at its price point.

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