Side by side

Hamilton Jazzmaster Day Date 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 Day Date Auto

Owners widely praise the Hamilton Jazzmaster Day Date Auto for its versatility as an everyday and business-casual timepiece. One owner specifically notes it felt the best on their wrist after trying multiple options. On balance, owners rate the Hamilton Jazzmaster Day Date Auto highly for its comfortable wearability and suitability for various occasions.

From video reviewers

The watch offers excellent build quality for its price point, with an 80-hour power reserve from the H-40 movement. The 50-meter water resistance is a limitation. Reviewers disagreed on the aesthetic appeal of the date window at 6 o'clock.

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

11 of 29 specs differ
Diameter
Jazzmaster Day Date Auto40mm
King Seiko KSK38.6mm
Power Reserve
Jazzmaster Day Date Auto80h
King Seiko KSK45h
Water Resistance
Jazzmaster Day Date Auto50m
King Seiko KSK50m
MSRP
Jazzmaster Day Date Auto$1,045
King Seiko KSK$3,300

Full specifications

Case

4 specs
Diameter
40mm
38.6mm
Thickness
11.52mm
10.7mm
Lug-to-Lug
0mm
45.8mm
Lug Width
20mm
19mm

Crystal & Dial

3 specs
Crystal Shape
Box
AR Coating
Anti-reflective coating on inner surface
Dial Color
Black

Movement

3 specs
Caliber
H-40 (ETA 2834-2 base)
6L35
Power Reserve
80h
45h
Jewels
0
26

Pricing

1 specs
MSRP
$1,045
$3,300
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