Side by side

Omega Seamaster Aqua Terra 150M Co Axial Master ChronometervsGrand Seiko STGK031

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

What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Omega Seamaster Aqua Terra 150M Co Axial Master Chronometer

Owners widely praise the Omega Seamaster Aqua Terra 150M Co Axial Master Chronometer for its versatility as a daily wear watch, with many highlighting its stunning finishing and the beauty of its dials, which can appear more gray than blue in person or pop vibrantly in sunlight. Reviewers and owners alike commend its understated design, making it suitable for both dress and sport occasions, and some consider it a great value. A few owners find the 41mm case size borders on large due to its plain dial, with some preferring smaller variants for better proportions on smaller wrists. One reviewer regrets the solid case back obscuring the Omega 8900 movement. Overall, owners and reviewers rate the Omega Seamaster Aqua Terra 150M Co Axial Master Chronometer highly for its versatile design and impressive finishing.

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.

At a glance

16 of 29 specs differ
Diameter
Seamaster Aqua Terra 150M Co Axial Master Chronometer41mm
STGK03130mm
Power Reserve
Seamaster Aqua Terra 150M Co Axial Master Chronometer60h
STGK03150h
Water Resistance
Seamaster Aqua Terra 150M Co Axial Master Chronometer150m
STGK031100m
MSRP
Seamaster Aqua Terra 150M Co Axial Master Chronometer$10,800
STGK031$6,600

Full specifications

Case

8 specs
Category
Sport
Dress
Diameter
41mm
30mm
Thickness
13.2mm
10.5mm
Lug-to-Lug
47.9mm
36.2mm
Lug Width
20mm
15mm
Material
Steel & Sedna Gold
Stainless Steel
Finish
Steel
Water Resistance
150m
100m

Crystal & Dial

3 specs
Crystal Shape
Domed
AR Coating
Yes
Dial Color
Blue

Movement

4 specs
Caliber
Omega 8900
9S27
Power Reserve
60h
50h
Hacking
Yes
No
Hand-winding
Yes
No

Pricing

1 specs
MSRP
$10,800
$6,600
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