Side by side

Hamilton Jazzmaster AutovsGrand 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.

Hamilton Jazzmaster Auto

The Hamilton Jazzmaster Auto is widely praised for its excellent value, clean and uncomplicated design suitable for various occasions, and comfortable wearability, with a 40mm or 42mm case size that is considered unobtrusive. Reviewers highlight its refined H-21 movement, which offers a 60-hour power reserve, and distinctive sunray dials. Overall, owners and reviewers rate the Hamilton Jazzmaster Auto highly for its impressive balance of contemporary style and traditional watchmaking at its price point.

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

10 of 29 specs differ
Diameter
Jazzmaster Auto36mm
STGK03130mm
Power Reserve
Jazzmaster Auto80h
STGK03150h
Water Resistance
Jazzmaster Auto50m
STGK031100m
MSRP
Jazzmaster Auto$1,125
STGK031$6,600

Full specifications

Case

5 specs
Diameter
36mm
30mm
Thickness
10mm
10.5mm
Lug-to-Lug
0mm
36.2mm
Lug Width
18mm
15mm
Water Resistance
50m
100m

Crystal & Dial

2 specs
AR Coating
Yes
Dial Color
Black

Movement

2 specs
Caliber
H-10
9S27
Power Reserve
80h
50h

Pricing

1 specs
MSRP
$1,125
$6,600
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