Side by side

Grand Seiko STGK031vsYema Navygraf Phantom CMM.10 Limited Edition

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

STGK031
Grand SeikoSTGK031
MSRP $6,600
Navygraf Phantom CMM.10 Limited Edition
YemaNavygraf Phantom CMM.10 Limited Edition
MSRP $2,090

At a glance

12 of 29 specs differ
Diameter
STGK03130mm
Navygraf Phantom CMM.10 Limited Edition38.5mm
Power Reserve
STGK03150h
Navygraf Phantom CMM.10 Limited Edition40h
Water Resistance
STGK031100m
Navygraf Phantom CMM.10 Limited Edition100m
MSRP
STGK031$6,600
Navygraf Phantom CMM.10 Limited Edition$2,090

Full specifications

Case

6 specs
Category
Dress
Diver
Diameter
30mm
38.5mm
Thickness
10.5mm
11.05mm
Lug-to-Lug
36.2mm
46mm
Lug Width
15mm
19mm
Material
Stainless Steel
316L Stainless Steel

Crystal & Dial

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

Movement

2 specs
Caliber
9S27
Yema CMM.10
Power Reserve
50h
40h

Pricing

1 specs
MSRP
$6,600
$2,090

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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 STGK031

Grand Seiko STGK031 owners widely praise its subtle, light pink dial that shifts to appear white or silver depending on lighting, its refined 30mm case size, and its simple elegance. Some find the 30mm sizing perfect for wearability, with one owner noting it is ideal for those who find 38mm watches too large. The Zaratsu polishing is also a noted strength. However, the Calibre 9S27 movement has a 50-hour power reserve and an accuracy range of +8 to -3 seconds per day, which some consider modest for the price. On balance, owners and reviewers rate the Grand Seiko STGK031 highly for its versatile dial and refined 30mm case.

From video reviewers

The 50-hour power reserve of the Calibre 9S27 movement is a shared strength. The 36mm lug-to-lug measurement is a weakness. Reviewers disagreed on the premium feel of the polished stainless steel case and bracelet compared to Zaratsu polishing.

Yema Navygraf Phantom CMM.10 Limited Edition

Owners widely praise the Yema Navygraf Phantom CMM.10 Limited Edition for its vibrant blue dial and well-finished 39mm stainless steel case. The watch delivers an impressive 70-hour power reserve and accurate timekeeping, with one owner reporting -3 seconds over two weeks. The H-link bracelet's clasp is criticized by reviewers for being difficult to open and rattly, with the Marine Nationale strap being the preferred alternative. Overall, owners and reviewers rate the Yema Navygraf Phantom CMM.10 Limited Edition highly for its striking dial color and robust specifications at its price point.

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