Which is cheaper, the Sheffield 1A or the Yema Skin Diver Slim CMM.20?

At MSRP the Sheffield 1A is the cheaper of the two at $223, against $2,117 for the Yema Skin Diver Slim CMM.20 — a $1,894 gap before any retailer discounting.

Which is bigger, the Sheffield 1A or the Yema Skin Diver Slim CMM.20?

The Yema Skin Diver Slim CMM.20 wears larger at 47mm versus 40mm for the Sheffield 1A — a 7mm difference across the dial.

What movement does the Sheffield 1A run compared to the Yema Skin Diver Slim CMM.20?

Both watches run automatic movements — the Sheffield 1A uses the Seiko NH35A and the Yema Skin Diver Slim CMM.20 uses the Yema CMM.20.

Side by side

Sheffield 1AvsYema Skin Diver Slim CMM.20

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

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Sheffield 1A

diver-1a-40mm-white

MSRP $223

Yema Skin Diver Slim CMM.20

yema-skin-diver-slim-cmm-20-limited-edition-12-24-99-sn-m3

MSRP $2,117

At a glance

10 of 29 specs differ

Diameter

1A40mm

Skin Diver Slim CMM.2047mm

Power Reserve

1A—

Skin Diver Slim CMM.2040h

Water Resistance

1A200m

Skin Diver Slim CMM.20200m

MSRP

1A$223

Skin Diver Slim CMM.20$2,117

Full specifications

Case

4 specs

Diameter

40mm

47mm

Thickness

12.8mm

10mm

Lug-to-Lug

46mm

47mm

Material

Stainless Steel

316L Stainless Steel

Crystal & Dial

3 specs

Crystal

Sapphire

Domed Sapphire

Dial Color

White/Blue

Steel

Lume

Swiss blue lume

None

Movement

2 specs

Caliber

Seiko NH35A

Yema CMM.20

Power Reserve

—

40h

Pricing

1 specs

MSRP

$223

$2,117

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Sheffield 1AvsYema Skin Diver Slim CMM.20

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