Side by side

Oak & Oscar The Humboldt GMTvsSeiko Prospex Sea 1968 Heritage Diver's GMT

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

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 1968 Heritage Diver's GMT

The Seiko Prospex Sea 1968 Heritage Diver's GMT is widely praised for its build quality, finishing, and comfortable wearability, offering good value for its price point. Owners and reviewers highlight the attractive silver/white sunray dial, blue ceramic bezel, and the premium feel of the improved bracelet clasp with excellent micro-adjustment. The Caliber 6R54 movement provides a 72-hour power reserve, and real-world accuracy often exceeds its stated range of +25 to -15 seconds per day, with some owners reporting figures around +3 to +5 seconds per day. However, the caller-style GMT functionality is a point of contention for some, who find the GMT scale difficult to read and prefer a flyer GMT at this price. Some also find the crown position at 4 o'clock undesirable, and a few note a lack of dial contrast or illegibility of the inner bezel.

At a glance

16 of 29 specs differ
Diameter
The Humboldt GMT39.5mm
Prospex Sea 1968 Heritage Diver's GMT42mm
Power Reserve
The Humboldt GMT56 hoursh
Prospex Sea 1968 Heritage Diver's GMT72h
Water Resistance
The Humboldt GMT200m
Prospex Sea 1968 Heritage Diver's GMT200m
MSRP
The Humboldt GMT$2,175
Prospex Sea 1968 Heritage Diver's GMT$1,500

Full specifications

Case

7 specs
Category
GMT
Diver
Diameter
39.5mm
42mm
Thickness
12.5mm
12.9mm
Lug-to-Lug
46.8mm
48.6mm
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 SW330-2
6R54
Beat Rate
4 vph
28,800 vph
Power Reserve
56 hoursh
72h
Jewels
25
24

Pricing

1 specs
MSRP
$2,175
$1,500
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