Side by side
Boldr BlastoisevsOak & Oscar The Humboldt GMT Titanium
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
13 of 29 specs differDiameter
Blastoise40mm
The Humboldt GMT Titanium39.5mm
Power Reserve
Blastoise40h
The Humboldt GMT Titanium56 hoursh
Water Resistance
Blastoise200m
The Humboldt GMT Titanium200m
MSRP
Blastoise$449
The Humboldt GMT Titanium$2,950
Full specifications
Case
6 specsCategory
Diver
GMT
Diameter
40mm
39.5mm
Thickness
12mm
12.5mm
Lug-to-Lug
49.5mm
46.8mm
Material
Stainless Steel
Grade 5 Titanium
Caseback
Solid
Solid screw-down
Crystal & Dial
3 specsCrystal Shape
Flat
Double-domed
AR Coating
Inner
Underside
Dial Color
Blastoise
Green
Movement
3 specsCaliber
Seiko (SII) NH37
Sellita SW330
Beat Rate
28,800 vph
4 vph
Power Reserve
40h
56 hoursh
Pricing
1 specsMSRP
$449
$2,950
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