Side by side
Oak & Oscar The Humboldt GMT USSS EditionvsGrand Seiko SLGB023
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
15 of 29 specs differDiameter
The Humboldt GMT USSS Edition39.5mm
SLGB02340.8mm
Power Reserve
The Humboldt GMT USSS Edition56 hoursh
SLGB02372h
Water Resistance
The Humboldt GMT USSS Edition200m
SLGB023300m
MSRP
The Humboldt GMT USSS Edition$2,200
SLGB023$12,400
Full specifications
Case
8 specsCategory
GMT
Diver
Diameter
39.5mm
40.8mm
Thickness
12.5mm
12.9mm
Lug-to-Lug
46.8mm
48.5mm
Lug Width
20mm
21mm
Material
316L Stainless Steel
Titanium
Water Resistance
200m
300m
Caseback
Engraved
Solid
Crystal & Dial
3 specsCrystal Shape
Double-domed
Flat
AR Coating
Inner
Yes
Lume
Super-LumiNova BGW9
None
Movement
3 specsCaliber
Sellita SW330
9RB1
Type
Automatic
Spring Drive
Power Reserve
56 hoursh
72h
Pricing
1 specsMSRP
$2,200
$12,400
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