Side by side

Seiko King Seiko KSKvsYema Skin Diver CMM.20

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

King Seiko KSK
SeikoKing Seiko KSK
MSRP $3,300
Skin Diver CMM.20
YemaSkin Diver CMM.20
MSRP $2,372

At a glance

14 of 29 specs differ
Diameter
King Seiko KSK38.6mm
Skin Diver CMM.2039.5mm
Power Reserve
King Seiko KSK45h
Skin Diver CMM.2040h
Water Resistance
King Seiko KSK50m
Skin Diver CMM.20200m
MSRP
King Seiko KSK$3,300
Skin Diver CMM.20$2,372

Full specifications

Case

7 specs
Category
Dress
Diver
Diameter
38.6mm
39.5mm
Thickness
10.7mm
11.5mm
Lug-to-Lug
45.8mm
47mm
Lug Width
19mm
20mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
50m
200m

Crystal & Dial

3 specs
Crystal
Sapphire
Domed Sapphire
Crystal Shape
Box
Flat
AR Coating
Anti-reflective coating on inner surface
Inner

Movement

3 specs
Caliber
6L35
Yema CMM.20
Power Reserve
45h
40h
Jewels
26
25

Pricing

1 specs
MSRP
$3,300
$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.

Seiko King Seiko KSK

Owners and reviewers widely praise the King Seiko KSK for its exceptional dial and case finishing, often compared to higher-end brands, and its slim, retro design. The use of the Calibre 6L35 movement in some variants is seen as a significant upgrade, contributing to a refined feel, while others note the bracelet is unusually nice and the case offers a mix of brushed and polished finishes with sharp angles. However, some owners question the value proposition, citing misaligned screws and clasp components on their examples, and the standard 6R movement in some models is criticized as a disappointment for the price point. Accuracy figures range from +15/-10 seconds per day to +5 to +7 seconds per day, and water resistance is rated at 5 BAR or 50 meters. Overall, owners and reviewers find the King Seiko KSK to be a beautiful and classy watch with fantastic finishing, though some are divided on its value and movement choice 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.

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