Side by side

Oak & Oscar The Humboldt GMT SAR EditionvsSeiko Prospex Sea

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
Prospex Sea
SeikoProspex Sea
MSRP $625

At a glance

15 of 29 specs differ
Diameter
The Humboldt GMT SAR Edition39.5mm
Prospex Sea43.8mm
Power Reserve
The Humboldt GMT SAR Edition56 hoursh
Prospex Sea41h
Water Resistance
The Humboldt GMT SAR Edition200m
Prospex Sea200m
MSRP
The Humboldt GMT SAR Edition$2,950
Prospex Sea$625

Full specifications

Case

7 specs
Category
GMT
Diver
Diameter
39.5mm
43.8mm
Thickness
12.5mm
12.8mm
Lug-to-Lug
46.8mm
48.7mm
Lug Width
20mm
22mm
Material
Grade 5 Titanium
Stainless Steel
Caseback
Solid screw-down
Solid

Crystal & Dial

3 specs
Crystal Shape
Double-domed
Flat
AR Coating
Underside
Anti-reflective coating on inner surface
Lume
Super-LumiNova
LumiBrite on hands, index(es) and bezel

Movement

4 specs
Caliber
Sellita SW330
4R35
Beat Rate
4 vph
28,800 vph
Power Reserve
56 hoursh
41h
Jewels
25
23

Pricing

1 specs
MSRP
$2,950
$625

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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.

Seiko Prospex Sea

The Seiko Prospex Sea is widely praised for its excellent value, solid build quality, and comfortable wearability, with many models featuring impressive lume and attractive dials. Owners and reviewers highlight the modern upgrades on classic designs, such as drilled lugs and reliable movements with hacking and hand-winding capabilities. Some models are noted for their refined case finishing and scratch resistance. Accuracy figures vary, with one owner reporting approximately 4 seconds fast per day, while others find the movements offer good performance for the price. Concerns raised by owners and reviewers include clasps that can feel generic or cheap, and lug widths that some find disproportionate to the case size on certain models. The thickness and weight of some Prospex Sea watches are also noted as substantial. The GMT function on specific models is considered secondary and difficult to read for true travel purposes.

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