Side by side

Seiko Baby AlpinistvsYema Skin Diver Slim CMM.20

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

Baby Alpinist
SeikoBaby Alpinist
MSRP $725
Skin Diver Slim CMM.20
YemaSkin Diver Slim CMM.20
MSRP $2,117

At a glance

14 of 29 specs differ
Diameter
Baby Alpinist38mm
Skin Diver Slim CMM.2047mm
Power Reserve
Baby Alpinist70h
Skin Diver Slim CMM.2040h
Water Resistance
Baby Alpinist200m
Skin Diver Slim CMM.20200m
MSRP
Baby Alpinist$725
Skin Diver Slim CMM.20$2,117

Full specifications

Case

5 specs
Category
Field
Diver
Diameter
38mm
47mm
Thickness
12.9mm
10mm
Lug-to-Lug
46mm
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 and index(es)
None

Movement

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

Pricing

1 specs
MSRP
$725
$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 Baby Alpinist

Seiko Prospex Land owners widely praise its comfortable, sub-12mm cushion case that wears smaller than its dimensions suggest, and its sharp, attractive appearance featuring outstanding brushing and applied indices. Reviewers note its legible dial, solid movement, and 100m water resistance at a fair price, with some owners appreciating its unique combination of features. However, the stock strap is consistently described as stiff and uncomfortable, and one owner would prefer a numbered bezel over cardinal directions. Accuracy is reported around -10 seconds per day, and the internal rotating bezel's action is considered good for the price but not as refined as higher-end models. On balance, owners and reviewers rate the Seiko Prospex Land highly for its comfortable wearability and attractive finishing at its price point.

From video reviewers

The watch's bezel action is smooth and precise. The watch's lume is somewhat lacking, with the hour markers not being as bright as they'd like. Reviewers disagree on the ideal case size, with some preferring 38mm and others 41.4mm.

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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