Side by side

Borealis Watch Co. Bull Shark V2vsYema Skin Diver CMM.20

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

Bull Shark V2
Borealis Watch Co.Bull Shark V2
MSRP $495
Skin Diver CMM.20
YemaSkin Diver CMM.20
MSRP $2,372

At a glance

10 of 29 specs differ
Diameter
Bull Shark V238mm
Skin Diver CMM.2039.5mm
Power Reserve
Bull Shark V240h
Skin Diver CMM.2040h
Water Resistance
Bull Shark V2300m
Skin Diver CMM.20200m
MSRP
Bull Shark V2$495
Skin Diver CMM.20$2,372

Full specifications

Case

6 specs
Diameter
38mm
39.5mm
Thickness
12.60mm
11.5mm
Lug-to-Lug
47.00mm
47mm
Lug Width
20mm
20mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
300m
200m

Crystal & Dial

2 specs
Crystal
Sapphire
Domed Sapphire
Lume
BGW9
None

Movement

1 specs
Caliber
Miyota 9039
Yema CMM.20

Pricing

1 specs
MSRP
$495
$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.

Borealis Watch Co. Bull Shark V2

The red bezel is a standout feature. The watch wears small, which is a concern for larger wrists.

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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