Side by side

Citizen Series 8 870vsYema Skin Diver CMM.20

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

Series 8 870
CitizenSeries 8 870
MSRP $1,095
Skin Diver CMM.20
YemaSkin Diver CMM.20
MSRP $2,372

At a glance

13 of 29 specs differ
Diameter
Series 8 87039mm
Skin Diver CMM.2039.5mm
Power Reserve
Series 8 87042h
Skin Diver CMM.2040h
Water Resistance
Series 8 870100m
Skin Diver CMM.20200m
MSRP
Series 8 870$1,095
Skin Diver CMM.20$2,372

Full specifications

Case

7 specs
Category
Sport
Diver
Diameter
39mm
39.5mm
Thickness
12mm
11.5mm
Lug-to-Lug
46mm
47mm
Lug Width
11mm
20mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
100m
200m

Crystal & Dial

3 specs
Crystal
Sapphire
Domed Sapphire
AR Coating
Underside
Inner
Dial Color
Green
Black

Movement

2 specs
Caliber
9051
Yema CMM.20
Power Reserve
42h
40h

Pricing

1 specs
MSRP
$1,095
$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.

Citizen Series 8 870

The Citizen Series 8 870 is praised for its compelling value proposition and modern Japanese design with a sporty edge. Reviewers note its 40mm steel case, glossy dial with applied markers, and the in-house Calibre 0950 automatic movement offering 50 hours of power reserve and enhanced magnetic resistance. The flat sapphire crystal is noted to collect fingerprints, and the solid caseback omits a view of the movement. The limited edition variant features a 40.8mm black DLC-coated case, a carbon fiber dial, and the 0950 movement regulated to -5/+10 seconds per day. Overall, the Citizen Series 8 870 is viewed as a strong offering for its blend of design and features.

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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