Side by side

Grand Seiko STGK031vsWolbrook Skindiver Automatic

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

STGK031
Grand SeikoSTGK031
MSRP $6,600
Skindiver Automatic
WolbrookSkindiver Automatic
MSRP $453

At a glance

13 of 29 specs differ
Diameter
STGK03130mm
Skindiver Automatic40mm
Power Reserve
STGK03150h
Skindiver Automatic40h
Water Resistance
STGK031100m
Skindiver Automatic150m
MSRP
STGK031$6,600
Skindiver Automatic$453

Full specifications

Case

7 specs
Category
Dress
Diver
Diameter
30mm
40mm
Thickness
10.5mm
13mm
Lug-to-Lug
36.2mm
Lug Width
15mm
20mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
100m
150m

Crystal & Dial

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

Movement

2 specs
Caliber
9S27
Miyota 8315
Power Reserve
50h
40h

Pricing

1 specs
MSRP
$6,600
$453

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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.

Wolbrook Skindiver Automatic

The Wolbrook Skindiver Automatic is widely praised for its attractive vintage aesthetic, comfortable wearability, and legible dial, with many owners highlighting its quality build and value under $500. Owners often commend the Beads of Rice bracelet and tropic strap, the box sapphire crystal, and the overall solid feel that suggests nothing is cheap. Specific praise is given to its lume, which some find lasts well and is great, and its accuracy, with one owner noting exceptional performance. However, some find the finishing merely fine, not exceptional, and note issues with the push-pull crown lacking a positive lock or being noisy. The 20mm strap width and drilled lugs that don't fit all spring bars are also mentioned as potential drawbacks. The Miyota 8315 movement, while preferred over the 8215, is described by one owner as noisy, and the non-transferable warranty policy is a concern for some.

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