Side by side
Oak & Oscar The Humboldt GMT TitaniumvsGrand Seiko SBGW257
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
17 of 29 specs differDiameter
The Humboldt GMT Titanium39.5mm
SBGW25738mm
Power Reserve
The Humboldt GMT Titanium56 hoursh
SBGW25772h
Water Resistance
The Humboldt GMT Titanium200m
SBGW25730m
MSRP
The Humboldt GMT Titanium$2,950
SBGW257$38,000
Full specifications
Case
8 specsCategory
GMT
Dress
Diameter
39.5mm
38mm
Thickness
12.5mm
10.9mm
Lug-to-Lug
46.8mm
45.8mm
Lug Width
20mm
19mm
Material
Grade 5 Titanium
Platinum
Water Resistance
200m
30m
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
9S64
Type
Automatic
Manual
Beat Rate
4 vph
28,800 vph
Power Reserve
56 hoursh
72h
Pricing
1 specsMSRP
$2,950
$38,000
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