Side by side

Oak & Oscar The Humboldt GMTvsSeiko Prospex Sea Save the Ocean Special Edition

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

The Humboldt GMT
Oak & OscarThe Humboldt GMT
MSRP $2,175

At a glance

17 of 29 specs differ
Diameter
The Humboldt GMT39.5mm
Prospex Sea Save the Ocean Special Edition45mm
Power Reserve
The Humboldt GMT56 hoursh
Prospex Sea Save the Ocean Special Edition41h
Water Resistance
The Humboldt GMT200m
Prospex Sea Save the Ocean Special Edition200m
MSRP
The Humboldt GMT$2,175
Prospex Sea Save the Ocean Special Edition$625

Full specifications

Case

8 specs
Category
GMT
Diver
Diameter
39.5mm
45mm
Thickness
12.5mm
13.2mm
Lug-to-Lug
46.8mm
47.7mm
Lug Width
20mm
22mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed
Brushed and polished
Caseback
Solid screw-down
Solid

Crystal & Dial

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

Movement

4 specs
Caliber
Sellita SW330
4R36
Beat Rate
4 vph
28,800 vph
Power Reserve
56 hoursh
41h
Jewels
25
24

Pricing

1 specs
MSRP
$2,175
$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

Oak & Oscar The Humboldt GMT owners widely praise its exceptional accuracy, often running at or near 0 seconds per day, and its comfortable wearability with subtle design details. The construction quality for the price point, sandwich lume, and anti-magnetic properties are also highlighted. Some owners find the bracelet sizing adjustment slightly awkward, and one noted the lume could be brighter. Overall, owners rate the Oak & Oscar The Humboldt GMT highly for its accuracy and comfortable wearability.

Seiko Prospex Sea Save the Ocean Special Edition

The Seiko Prospex Sea Save the Ocean Special Edition is widely praised for its attractive, unique, and textured dials, often described as having a "Grand Seiko feel" at a more accessible price point, with specific mentions of wave patterns, lagoon hues, and manta ray motifs. Owners appreciate the smooth bezel operation and satisfactory lume. Accuracy figures vary, with one owner reporting +5 seconds per day, while another notes a range from +1/+2 to about -6 seconds per day. The 6R35 movement offers a 70-hour power reserve, and some models feature sapphire crystals. Criticisms include a desire for exhibition casebacks and concerns about the quality and security of the stamped metal clasps and bracelets, which are frequently described as rattly or underwhelming, though this is noted as a common Seiko trait. Some owners are split on the number of Save the Ocean variations and dislike the cyclops magnifier.

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