Side by side

Grand Seiko SLGW004vsYema Navygraf CMM.10

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

SLGW004
Grand SeikoSLGW004
MSRP $30,000
Navygraf CMM.10
YemaNavygraf CMM.10
MSRP $1,899

At a glance

13 of 29 specs differ
Diameter
SLGW00438.8mm
Navygraf CMM.1039mm
Power Reserve
SLGW00480h
Navygraf CMM.1040h
Water Resistance
SLGW00430m
Navygraf CMM.10100m
MSRP
SLGW004$30,000
Navygraf CMM.10$1,899

Full specifications

Case

6 specs
Category
Dress
Diver
Diameter
38.8mm
39mm
Thickness
10.4mm
11mm
Lug-to-Lug
43.7mm
46mm
Material
Gold
316L Stainless Steel
Water Resistance
30m
100m

Crystal & Dial

3 specs
Crystal
Sapphire
Domed Sapphire
AR Coating
Yes
Inner
Dial Color
Black
Standard

Movement

3 specs
Caliber
9SA4
Yema CMM.10
Type
Manual
Automatic
Power Reserve
80h
40h

Pricing

1 specs
MSRP
$30,000
$1,899

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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.

Grand Seiko SLGW004

The Grand Seiko SLGW004 is praised for its elegant, faithful reissue design and impressive technical execution, featuring a new 9SA4 hi-beat manual-winding movement with an 80-hour power reserve and accuracy of -3/+5 seconds per day. Reviewers highlight the sharp case facets, double-signed dial, and beautifully decorated movement visible through the display caseback, along with an enjoyable winding experience. One reviewer noted a desire for better water resistance and expressed a dislike for the etched sapphire case back. Overall, reviewers rate the Grand Seiko SLGW004 highly for its elegant design and technically impressive movement.

Yema Navygraf CMM.10

Owners widely report quality control concerns and suspect craftsmanship with the Yema Navygraf, with one user noting crooked text. A reviewer praised the Slim CMM.20 Limited Edition for its stylish, slim profile and classy finishing on a black lacquered enamel dial, though the audible micro-rotor spinning at its price point was a surprise. On balance, the consensus is that while the Yema Navygraf offers a stylish design, potential buyers should be aware of reported quality control issues.

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