Side by side

Zelos Hammerhead (Tantalum LE)vsGrand Seiko STGK031

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

Hammerhead (Tantalum LE)
ZelosHammerhead (Tantalum LE)
MSRP $1,499
STGK031
Grand SeikoSTGK031
MSRP $6,600

At a glance

13 of 29 specs differ
Diameter
Hammerhead (Tantalum LE)44mm
STGK03130mm
Power Reserve
Hammerhead (Tantalum LE)40h
STGK03150h
Water Resistance
Hammerhead (Tantalum LE)300m
STGK031100m
MSRP
Hammerhead (Tantalum LE)$1,499
STGK031$6,600

Full specifications

Case

7 specs
Category
Diver
Dress
Diameter
44mm
30mm
Thickness
13mm
10.5mm
Lug-to-Lug
44mm
36.2mm
Lug Width
22mm
15mm
Material
Titanium
Stainless Steel
Water Resistance
300m
100m

Crystal & Dial

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

Movement

2 specs
Caliber
Seiko NH35
9S27
Power Reserve
40h
50h

Pricing

1 specs
MSRP
$1,499
$6,600

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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.

Zelos Hammerhead (Tantalum LE)

The Zelos Hammerhead (Tantalum LE) features a forged carbon dial and bezel insert with infused lume. On balance, owners and reviewers rate the Zelos Hammerhead (Tantalum LE) highly for its unique material composition and substantial feel.

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.

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