Side by side

Citizen Atomic Perpetual A-TvsOak & Oscar The Humboldt GMT

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

15 of 29 specs differ
Diameter
Atomic Perpetual A-T41mm
The Humboldt GMT39.5mm
Power Reserve
Atomic Perpetual A-T40h
The Humboldt GMT56 hoursh
Water Resistance
Atomic Perpetual A-T200m
The Humboldt GMT200m
MSRP
Atomic Perpetual A-T
The Humboldt GMT$2,175

Full specifications

Case

7 specs
Category
Pilot
GMT
Diameter
41mm
39.5mm
Thickness
12mm
12.5mm
Lug-to-Lug
46mm
46.8mm
Material
Stainless Steel
316L Stainless Steel
Finish
Brushed and polished
Brushed
Caseback
Solid
Solid screw-down

Crystal & Dial

3 specs
Crystal Shape
Flat
Double-domed
Dial Color
Blue
White
Lume
None
Super-LumiNova

Movement

4 specs
Caliber
H800
Sellita SW330
Type
Solar
Automatic
Beat Rate
28,800 vph
4 vph
Power Reserve
40h
56 hoursh

Pricing

1 specs
MSRP
$2,175

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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.

Citizen Atomic Perpetual A-T

Owners widely praise the Citizen Atomic Perpetual A-T for its handsome appearance, solid fit and finish, comfortable bracelet, and intuitive world time function. Its perpetual calendar and atomic timekeeping are highlighted as major conveniences, maintaining accuracy within 0.5 seconds even without syncing, and owners appreciate its "set & forget" nature and solar charging. The watch features a modest, stylish blue dial with delicate design details and a clutter-free layout, along with high water resistance without a screw-down crown and light titanium construction. Some find the dial unnecessarily busy, and its time zone functionality is noted as less useful outside the US, with atomic sync being less compelling below the equator. Accuracy is reported as +/-15 seconds per month if not syncing, but +/-0 seconds if it syncs via radio signal. Some find the watch a bit on the large side.

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.

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