Side by side

Oak & Oscar The Humboldt GMT SAR EditionvsYema Skin Diver CMM.20

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
Skin Diver CMM.20
YemaSkin Diver CMM.20
MSRP $2,372

At a glance

13 of 29 specs differ
Diameter
The Humboldt GMT SAR Edition39.5mm
Skin Diver CMM.2039.5mm
Power Reserve
The Humboldt GMT SAR Edition56 hoursh
Skin Diver CMM.2040h
Water Resistance
The Humboldt GMT SAR Edition200m
Skin Diver CMM.20200m
MSRP
The Humboldt GMT SAR Edition$2,950
Skin Diver CMM.20$2,372

Full specifications

Case

5 specs
Category
GMT
Diver
Thickness
12.5mm
11.5mm
Lug-to-Lug
46.8mm
47mm
Material
Grade 5 Titanium
316L Stainless Steel
Caseback
Solid screw-down
Solid

Crystal & Dial

4 specs
Crystal
Sapphire
Domed Sapphire
Crystal Shape
Double-domed
Flat
AR Coating
Underside
Inner
Lume
Super-LumiNova
None

Movement

3 specs
Caliber
Sellita SW330
Yema CMM.20
Beat Rate
4 vph
28,800 vph
Power Reserve
56 hoursh
40h

Pricing

1 specs
MSRP
$2,950
$2,372

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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.

Yema Skin Diver CMM.20

Owners and reviewers widely praise the Yema Skin Diver CMM.20 for its vintage aesthetic, 39mm-39.5mm case size, and the in-house CMM.20 micro-rotor movement. The watch features a textured cream dial, sharp applied indices, and a satisfyingly over-engineered push-to-turn bi-directional bezel. The fully brushed bracelet with toolless micro-adjust clasp is highlighted as a significant improvement, though some note its extended lug-to-lug may challenge smaller wrists. Accuracy figures range from -3/+7 seconds per day to erratic results between 0 and -10 seconds per day, with a 70-hour power reserve. Some owners express concerns about the brand's QC reputation and the micro-rotor movement's performance, while one reviewer noted questionable finishing on a prototype's hour hand and a rattly clasp. Overall, owners and reviewers rate the Yema Skin Diver CMM.20 highly for its vintage styling and improved bracelet at the price.

From video reviewers

The sapphire bezel insert and in-house CMM.20 movement are noted strengths. Reviewers questioned the value proposition compared to other Yema models.

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