Side by side

Oak & Oscar The Humboldt GMTvsTornek-Rayville CISO M38 Field

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
CISO M38 Field
Tornek-RayvilleCISO M38 Field
MSRP $695

At a glance

16 of 29 specs differ
Diameter
The Humboldt GMT39.5mm
CISO M38 Field38mm
Power Reserve
The Humboldt GMT56 hoursh
CISO M38 Field42h
Water Resistance
The Humboldt GMT200m
CISO M38 Field100m
MSRP
The Humboldt GMT$2,175
CISO M38 Field$695

Full specifications

Case

8 specs
Category
GMT
Diameter
39.5mm
38mm
Thickness
12.5mm
12.45mm
Lug-to-Lug
46.8mm
43.6mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed
Brushed and polished
Water Resistance
200m
100m
Caseback
Solid screw-down
Solid

Crystal & Dial

4 specs
Crystal Shape
Double-domed
Flat
AR Coating
Underside
Yes
Dial Color
White
Black
Lume
Super-LumiNova
Superluminova

Movement

3 specs
Caliber
Sellita SW330
TMI NH36
Beat Rate
4 vph
28,800 vph
Power Reserve
56 hoursh
42h

Pricing

1 specs
MSRP
$2,175
$695

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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.

Tornek-Rayville CISO M38 Field

Owners widely report the Tornek-Rayville CISO M38 Field offers high overall quality with a comfortable bracelet featuring single-sided screw links. The watch exhibits minimal wear, with only hairline scratches and a faint, difficult-to-photograph bezel mark. On balance, owners value the Tornek-Rayville CISO M38 Field for its robust build and comfortable wearability.

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