Side by side

Seiko Prospex SeavsYema Skin Diver Slim CMM.20

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

Prospex Sea
SeikoProspex Sea
MSRP $900
Skin Diver Slim CMM.20
YemaSkin Diver Slim CMM.20
MSRP $2,117

At a glance

13 of 29 specs differ
Diameter
Prospex Sea41mm
Skin Diver Slim CMM.2047mm
Power Reserve
Prospex Sea70h
Skin Diver Slim CMM.2040h
Water Resistance
Prospex Sea200m
Skin Diver Slim CMM.20200m
MSRP
Prospex Sea$900
Skin Diver Slim CMM.20$2,117

Full specifications

Case

4 specs
Diameter
41mm
47mm
Thickness
12.3mm
10mm
Lug-to-Lug
46.9mm
47mm
Material
Stainless Steel
316L Stainless Steel

Crystal & Dial

5 specs
Crystal
Sapphire
Domed Sapphire
Crystal Shape
Curved
Flat
AR Coating
Anti-reflective coating on inner surface
Inner
Dial Color
Black
Steel
Lume
LumiBrite on hands, index(es) and bezel
None

Movement

3 specs
Caliber
6R35
Yema CMM.20
Power Reserve
70h
40h
Jewels
24
25

Pricing

1 specs
MSRP
$900
$2,117

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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.

Seiko Prospex Sea

Owners widely praise the Seiko Prospex Sea for its excellent lume, robust build, and value, with many highlighting the comfortable 4 o'clock crown and reliable movements. Reviewers note impressive case finishing and attractive dials, with specific models lauded for their gradient blue designs and smooth bezel actions. Accuracy figures vary, with one owner reporting +9 seconds/day after demagnetization, while others find the watches to be good first "proper" watches. Some owners find the stock rubber straps uncomfortable or the overall size substantial on smaller wrists. On balance, owners and reviewers rate the Seiko Prospex Sea highly for its combination of strong dive watch functionality and appealing design at its price point.

Yema Skin Diver Slim CMM.20

Owners and reviewers widely praise the Yema Skin Diver Slim CMM.20 for its balanced 39mm case, vintage aesthetic, and unique champagne dial. The proprietary CMM.20 micro-rotor movement is a notable feature, though some owners report potential QC issues including erratic timegrapher readings and second-hand stutter. The lume is described as subdued, and while some find the "dragon scale" bracelet beautiful, others consider it generic. The price point is a hurdle for some, and the stamped clasp quality is considered subpar by one reviewer, with a gap noted by an owner. The lack of hacking seconds is flagged as a drawback at its price. Overall, owners and reviewers rate the Yema Skin Diver Slim CMM.20 highly for its vintage charm and balanced wearability.

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