Side by side
Oak & Oscar The Humboldt GMT TitaniumvsGrand Seiko SLGA015
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
16 of 29 specs differDiameter
The Humboldt GMT Titanium39.5mm
SLGA01543.8mm
Power Reserve
The Humboldt GMT Titanium56 hoursh
SLGA015120h
Water Resistance
The Humboldt GMT Titanium200m
SLGA015200m
MSRP
The Humboldt GMT Titanium$2,950
SLGA015$12,600
Full specifications
Case
7 specsCategory
GMT
Diver
Diameter
39.5mm
43.8mm
Thickness
12.5mm
13.8mm
Lug-to-Lug
46.8mm
51.5mm
Lug Width
20mm
23mm
Material
Grade 5 Titanium
Titanium
Caseback
Solid screw-down
Solid
Crystal & Dial
4 specsCrystal Shape
Double-domed
Flat
AR Coating
Underside
Yes
Dial Color
Green
Black
Lume
Super-LumiNova
None
Movement
4 specsCaliber
Sellita SW330
9RA5
Type
Automatic
Spring Drive
Beat Rate
4 vph
28,800 vph
Power Reserve
56 hoursh
120h
Pricing
1 specsMSRP
$2,950
$12,600
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