Side by side

Bremont Supermarine 300MvsGrand Seiko SBGH263

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

Supermarine 300M
BremontSupermarine 300M
MSRP $3,550
SBGH263
Grand SeikoSBGH263
MSRP $6,200

At a glance

12 of 29 specs differ
Diameter
Supermarine 300M40mm
SBGH26339.5mm
Power Reserve
Supermarine 300M40h
SBGH26355h
Water Resistance
Supermarine 300M300m
SBGH26330m
MSRP
Supermarine 300M$3,550
SBGH263$6,200

Full specifications

Case

7 specs
Category
Diver
Dress
Diameter
40mm
39.5mm
Thickness
12mm
13.1mm
Lug-to-Lug
46mm
Lug Width
20mm
19mm
Material
904L Stainless Steel
Stainless Steel
Water Resistance
300m
30m

Crystal & Dial

2 specs
AR Coating
Inner
Yes
Dial Color
Green
Black

Movement

2 specs
Caliber
BE-92AE
9S85
Power Reserve
40h
55h

Pricing

1 specs
MSRP
$3,550
$6,200

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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 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 SBGH263

The Grand Seiko SBGH263 is praised for its excellent finishing for the price, with reviewers comparing it to Jaeger-LeCoultre. Owners and reviewers highlight the stunning 'Shironeri' dial and gold hands/numerals, and the 39.5mm case size is considered a perfect fit, referencing vintage Grand Seiko models. The watch features a 55-hour power reserve from its 36,000 BPH movement, though one reviewer felt the date aperture was unnecessary. On balance, owners and reviewers rate the Grand Seiko SBGH263 highly for its exceptional dial and finishing at its price point.

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