Side by side

Matterhorn Watch Co. DiveMaster 300vsSpinnaker Dumas GMT

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

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DiveMaster 300
Matterhorn Watch Co.DiveMaster 300
MSRP $401
Dumas GMT
SpinnakerDumas GMT
MSRP $399
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Buy from Spinnaker ↗
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At a glance

11 of 29 specs differ
Diameter
DiveMaster 30041mm
Dumas GMT44mm
Power Reserve
DiveMaster 30042h
Dumas GMT40h
Water Resistance
DiveMaster 300300m
Dumas GMT300m
MSRP
DiveMaster 300$401
Dumas GMT$399

Full specifications

Case

6 specs
Category
—
GMT
Diameter
41mm
44mm
Thickness
12.8mm
15mm
Lug-to-Lug
47mm
48mm
Lug Width
—
22mm
Material
Stainless Steel
316L Stainless Steel

Crystal & Dial

2 specs
Dial Color
Black
Blue
Lume
BGW9
None

Movement

2 specs
Caliber
Miyota 9015
Seiko NH34A
Power Reserve
42h
40h

Pricing

1 specs
MSRP
—
$399
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