Side by side

Hamilton Jazzmaster AutovsSeiko King Seiko KSK

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.

Seiko King Seiko KSK

Owners and reviewers widely praise the King Seiko KSK for its exceptional dial and case finishing, often compared to higher-end brands, and its slim, retro design. The use of the Calibre 6L35 movement in some variants is seen as a significant upgrade, contributing to a refined feel, while others note the bracelet is unusually nice and the case offers a mix of brushed and polished finishes with sharp angles. However, some owners question the value proposition, citing misaligned screws and clasp components on their examples, and the standard 6R movement in some models is criticized as a disappointment for the price point. Accuracy figures range from +15/-10 seconds per day to +5 to +7 seconds per day, and water resistance is rated at 5 BAR or 50 meters. Overall, owners and reviewers find the King Seiko KSK to be a beautiful and classy watch with fantastic finishing, though some are divided on its value and movement choice at its price point.

At a glance

10 of 29 specs differ
Diameter
Jazzmaster Auto36mm
King Seiko KSK38.6mm
Power Reserve
Jazzmaster Auto80h
King Seiko KSK45h
Water Resistance
Jazzmaster Auto50m
King Seiko KSK50m
MSRP
Jazzmaster Auto$1,125
King Seiko KSK$3,300

Full specifications

Case

4 specs
Diameter
36mm
38.6mm
Thickness
10mm
10.7mm
Lug-to-Lug
46mm
45.8mm
Lug Width
18mm
19mm

Crystal & Dial

2 specs
Crystal Shape
Flat
Box
AR Coating
Inner
Anti-reflective coating on inner surface

Movement

3 specs
Caliber
H-10
Seiko 6L35
Power Reserve
80h
45h
Jewels
25
26

Pricing

1 specs
MSRP
$1,125
$3,300
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