Side by side
Oak & Oscar The Humboldt GMT TitaniumvsPhoibos Reef Master
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
13 of 29 specs differDiameter
The Humboldt GMT Titanium39.5mm
Reef Master42mm
Power Reserve
The Humboldt GMT Titanium56 hoursh
Reef Master40h
Water Resistance
The Humboldt GMT Titanium200m
Reef Master200m
MSRP
The Humboldt GMT Titanium$2,950
Reef Master$335
Full specifications
Case
7 specsCategory
GMT
Diver
Diameter
39.5mm
42mm
Thickness
12.5mm
13mm
Lug-to-Lug
46.8mm
48mm
Lug Width
20mm
22mm
Material
Grade 5 Titanium
Stainless Steel
Caseback
Solid screw-down
Solid
Crystal & Dial
2 specsCrystal Shape
Double-domed
Flat
AR Coating
Underside
Yes
Movement
3 specsCaliber
Sellita SW330
SII NH38
Beat Rate
4 vph
28,800 vph
Power Reserve
56 hoursh
40h
Pricing
1 specsMSRP
$2,950
$335
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