Side by side

Bremont Supermarine 300MvsSugess Ocean Star S421

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

Supermarine 300M
BremontSupermarine 300M
MSRP $3,550
Ocean Star S421
SugessOcean Star S421
MSRP $449

At a glance

8 of 29 specs differ
Diameter
Supermarine 300M40mm
Ocean Star S42140mm
Power Reserve
Supermarine 300M40h
Ocean Star S42140h
Water Resistance
Supermarine 300M300m
Ocean Star S421300m
MSRP
Supermarine 300M$3,550
Ocean Star S421$449

Full specifications

Case

3 specs
Thickness
12mm
12.7mm
Lug-to-Lug
—
46mm
Material
904L Stainless Steel
Stainless Steel

Crystal & Dial

1 specs
Dial Color
Green
SU116610LB Black

Movement

3 specs
Caliber
BE-92AE
Seagull ST2130/Seiko NH35
Beat Rate
28,800 vph
4 vph
Complications
None
GMT, Chronograph, Moonphase, Date

Pricing

1 specs
MSRP
$3,550
$449

Follow this matchup

Get a note when Bremont Supermarine 300M vs Sugess Ocean Star S421 gets more votes, a community discussion, or a price drop. No account needed.

Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Spinnaker Spence 300
Spinnakermicro

Spence 300

11 variantsSpence
40mm·Automatic·300m WR
$650MSRP
—Used
Yema Superman Dato CMM.10
Yemamicro

Superman Dato CMM.10

9 watches · 22 variantsSuperman
39.5mm·Automatic·300m WR
$1,777MSRP
—Used
Vaer D5 Tropic Auto
Vaermicro
Tropic

D5 Tropic Auto

Ref. d5-tropic-usa-diver
39mm·Automatic·200m WR
$699MSRP
—Used
Dryden Pathfinder
Drydenmicro

Pathfinder

9 variantsPathfinder
41mm·Automatic·201m WR
$650MSRP
—Used
Spinnaker Fleuss 40 Automatic
Spinnakermicro

Fleuss 40 Automatic

9 watches · 43 variantsFleuss
40mm·Automatic·150m WR
$450MSRP
—Used
Geckota Sea-Hunter Dive Watch
Geckotamicro

Sea-Hunter Dive Watch

6 variantsSea-Hunter
40mm·Automatic·200m WR
$349MSRP
—Used
Hemel HD24 Automatic
Hemelmicro

HD24 Automatic

8 variantsHD24
40mm·Automatic·200m WR
$300MSRP
—Used
Marathon OSAR-D (Original SAR with Date) Automatic 41mm
Marathonmicro

OSAR-D (Original SAR with Date) Automatic 41mm

6 watches · 6 variantsOSAR
41mm·Automatic·300m WR
$1,800MSRP
—Used
All alternatives to the Supermarine 300M →All alternatives to the Ocean Star S421 →
Explore the full catalog
Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.

Sugess Ocean Star S421vsSpinnaker Spence 300Sugess Ocean Star S421vsVaer D5 Tropic AutoSugess Ocean Star S421vsSpinnaker Fleuss 40 AutomaticHemel HD24 AutomaticvsSugess Ocean Star S421Bremont Supermarine 300MvsYema Superman Dato CMM.10Bremont Supermarine 300MvsDryden Pathfinder
Edit this comparisonAdd another watchMore diver comparisonsBest Diver Watches Under $500Explore more 39–41mm watches