Side by side

Jack Mason Strat-o-timer GMTvsSeestern S450 Ocean Star

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

Add a watch
Strat-o-timer GMT
Jack MasonStrat-o-timer GMT
MSRP $1,099
S450 Ocean Star
SeesternS450 Ocean Star
MSRP $299
Buy from Jack Mason ↗
Buy used on eBay ↗
Buy from Seestern ↗
Buy used on eBay ↗

At a glance

13 of 29 specs differ
Diameter
Strat-o-timer GMT40mm
S450 Ocean Star40mm
Power Reserve
Strat-o-timer GMT42h
S450 Ocean Star41h
Water Resistance
Strat-o-timer GMT200m
S450 Ocean Star100m
MSRP
Strat-o-timer GMT$1,099
S450 Ocean Star$299

Full specifications

Case

5 specs
Category
—
Diver
Thickness
13.2mm
12mm
Lug-to-Lug
47mm
48mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
200m
100m

Crystal & Dial

2 specs
Dial Color
—
White
Lume
None
Tritium

Movement

5 specs
Caliber
Miyota 9075
TMI NH35A
Beat Rate
28,800 vph
21,600 vph
Power Reserve
42h
41h
Jewels
25
24
Complications
None
GMT, Date

Pricing

1 specs
MSRP
$1,099
$299
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.

Duckworth Prestex Broadgate GMT Automatic
Duckworth Prestexmicro

Broadgate GMT Automatic

5 variantsRef. broadgate-gmt
40mm·Automatic·200m WR
$895MSRP
—Used
Traska Freediver Arctic
Traskamicro

Freediver Arctic

Ref. FRD-WHT-NDT-V7
40mm·Automatic·200m WR
$735MSRP
—Used
TSAO Baltimore Limited Edition RedBar Baltimore
TSAO Baltimoremicro

Limited Edition RedBar Baltimore

Ref. redbar-baltimore-le
39mm·Automatic·200m WR
$900MSRP
—Used
Christopher Ward C60 Atoll 300
Christopher Wardmicro
Atoll

C60 Atoll 300

2 watches · 3 variantsAtoll
40mm·Automatic·300m WR
$1,320MSRP
—Used
TSAO Baltimore LE DOW - Meteorite
TSAO Baltimoremicro

LE DOW - Meteorite

Ref. le-dow-meteorite
39mm·Automatic·200m WR
$750MSRP
—Used
Phoibos Argo
Phoibosmicro

Argo

Ref. phoibos-argo-200m-automatic-diver-watch-py052f-spiral-sunray-yellow
40.5mm·Automatic·200m WR
$345MSRP
—Used
Carlingue Timepieces CARL-AVI-01 / CT-002
Carlingue Timepiecesmicro

CARL-AVI-01 / CT-002

14 variantsRef. ct-002-a
40mm·Automatic·100m WR
$905MSRP
—Used
Phoibos Storm Corsair
Phoibosmicro

Storm Corsair

4 variantsStorm Corsair
40mm·Automatic·200m WR
$480MSRP
—Used
All alternatives to the Strat-o-timer GMT →All alternatives to the S450 Ocean Star →
Explore the full catalog

Follow this matchup

Get a note when Jack Mason Strat-o-timer GMT vs Seestern S450 Ocean Star gets more votes, a community discussion, or a price drop. No account needed.

Adjacent matchups

People also compared

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

Jack Mason Strat-o-timer GMTvsSeestern S450 Ocean StarDuckworth Prestex Broadgate GMT AutomaticvsSeestern S450 Ocean StarSeestern S450 Ocean StarvsTSAO Baltimore Limited Edition RedBar BaltimoreSeestern S450 Ocean StarvsTSAO Baltimore LE DOW - MeteoriteTraska Freediver ArcticvsJack Mason Strat-o-timer GMTChristopher Ward C60 Atoll 300vsJack Mason Strat-o-timer GMT
Edit this comparisonAdd another watchExplore more 39–41mm watches