Side by side

Oak & Oscar The Humboldt GMT SAR EditionvsSpinnaker Challenger Automatic

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

The Humboldt GMT SAR Edition
Oak & OscarThe Humboldt GMT SAR Edition
MSRP $2,950
Challenger Automatic
SpinnakerChallenger Automatic
MSRP $289

At a glance

15 of 29 specs differ
Diameter
The Humboldt GMT SAR Edition39.5mm
Challenger Automatic42mm
Power Reserve
The Humboldt GMT SAR Edition56 hoursh
Challenger Automatic40h
Water Resistance
The Humboldt GMT SAR Edition200m
Challenger Automatic200m
MSRP
The Humboldt GMT SAR Edition$2,950
Challenger Automatic$289

Full specifications

Case

7 specs
Category
GMT
Diver
Diameter
39.5mm
42mm
Thickness
12.5mm
19mm
Lug-to-Lug
46.8mm
49.5mm
Lug Width
20mm
22mm
Material
Grade 5 Titanium
316L Stainless Steel
Caseback
Solid screw-down
Solid

Crystal & Dial

4 specs
Crystal Shape
Double-domed
Flat
AR Coating
Underside
Inner
Dial Color
Black
Blue
Lume
Super-LumiNova
None

Movement

3 specs
Caliber
Sellita SW330
SII NH35A
Beat Rate
4 vph
28,800 vph
Power Reserve
56 hoursh
40h

Pricing

1 specs
MSRP
$2,950
$289

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Oak & Oscar The Humboldt GMT SAR Edition

Oak & Oscar The Humboldt GMT SAR Edition is praised for its anti-magnetic properties, sandwich lume dial, and overall construction quality for its price point. It features a brushed Grade 5 titanium case, a navy blue sandwich dial with an orange minute track and seconds hand, and a Sellita SW330 movement with a 56-hour power reserve. Minor drawbacks noted include bracelet sizing adjustment and lume brightness. On balance, owners and reviewers rate Oak & Oscar The Humboldt GMT SAR Edition highly for its robust construction and unique dial design at its price point.

Spinnaker Challenger Automatic

The Spinnaker Challenger Automatic is widely praised for its fun, playful design, solid build quality, and satisfying bezel action. Owners appreciate the comfortable 42mm DLC-coated case and the thoughtful integration of the Popeye theme, with the character serving as the hour and minute hands. Reviewers note the reliable Seiko NH35 movement and 300m water resistance. Some owners find the blue lume weaker than expected, and the ultra-domed sapphire crystal presents challenges for photography. The thick rubber strap is also cited as difficult to manage. Overall, owners and reviewers rate the Spinnaker Challenger Automatic highly for its unique character integration and solid dive watch fundamentals at its price point.

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