Side by side

Serket Watch Co Reef MarianavsSpinnaker Dumas GMT

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

Add a watch
Reef Mariana
Serket Watch CoReef Mariana
MSRP $449
Dumas GMT
SpinnakerDumas GMT
MSRP $399
Buy from Serket Watch Co ↗
Buy used on eBay ↗
Buy from Spinnaker ↗
Buy used on eBay ↗

At a glance

12 of 29 specs differ
Diameter
Reef Mariana40mm
Dumas GMT44mm
Power Reserve
Reef Mariana—
Dumas GMT40h
Water Resistance
Reef Mariana200m
Dumas GMT300m
MSRP
Reef Mariana$449
Dumas GMT$399

Full specifications

Case

7 specs
Category
—
GMT
Diameter
40mm
44mm
Thickness
13.2mm
15mm
Lug-to-Lug
47.5mm
48mm
Lug Width
20mm
22mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
200m
300m

Crystal & Dial

2 specs
Dial Color
Orange
Blue
Lume
BGW9
None

Movement

2 specs
Caliber
Seiko NH35
Seiko NH34A
Power Reserve
—
40h

Pricing

1 specs
MSRP
$449
$399
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.

DIFICIANO Marlin
DIFICIANOmicro

Marlin

4 variantsRef.
40mm·Automatic·300m WR
$399MSRP
—Used
Spinnaker Fleuss GMT
Spinnakermicro

Fleuss GMT

9 watches · 19 variantsFleuss
43mm·Automatic·150m WR
$299MSRP
—Used
DIFICIANO Narwhal
DIFICIANOmicro

Narwhal

38mm·Automatic·300m WR
$419MSRP
—Used
Spinnaker Tesei Mille Metri GMT
Spinnakermicro

Tesei Mille Metri GMT

4 watches · 10 variantsTesei
44mm·Automatic·1000m WR
$559MSRP
—Used
Ventus Watches Northstar
Ventus Watchesmicro

Northstar

8 variantsRef. northstar-n-08
40mm·Automatic·300m WR
—MSRP
—Used
Islander Islander Calabro GMT World Time Automatic Watch with Anthracite Dial #ISL-316
Islandermicro
Under $50

Islander Calabro GMT World Time Automatic Watch with Anthracite Dial #ISL-316

9 watches · 9 variantsUnder $50
40mm·Automatic·200m WR
$379MSRP
—Used
Boldr The T Rex By Boldr X Nitecore
Boldrmicro

The T Rex By Boldr X Nitecore

Ref. the-t-rex-by-boldr-x-nitecore
40mm·Automatic·200m WR
$499MSRP
—Used
Boldr Merlion 50th Anniversary
Boldrmicro
Limited Editions

Merlion 50th Anniversary

Ref. merlion-50th-anniversary
40mm·Automatic·200m WR
$449MSRP
—Used
All alternatives to the Reef Mariana →All alternatives to the Dumas GMT →
Explore the full catalog

Follow this matchup

Get a note when Serket Watch Co Reef Mariana vs Spinnaker Dumas GMT 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.

DIFICIANO MarlinvsSpinnaker Dumas GMTSerket Watch Co Reef X Diver Black DLCvsSpinnaker Dumas GMTDIFICIANO NarwhalvsSpinnaker Dumas GMTSpinnaker Dumas GMTvsVentus Watches NorthstarSerket Watch Co Reef MarianavsSpinnaker Fleuss GMTSerket Watch Co Reef MarianavsSpinnaker Tesei Mille Metri GMT
Edit this comparisonAdd another watchExplore more 39–45mm watches