Side by side

Hamilton Jazzmaster Viewmatic 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 Viewmatic Auto

Owners widely praise the Hamilton Jazzmaster Viewmatic Auto for its classic yet modern aesthetic, comfortable 37mm size suitable for smaller wrists, and superb case finishing for the price. The textured silver dial and subtle blue hands are noted as appealing details, and the watch is seen as versatile for both casual and formal wear. Accuracy is reported as impressive, with some owners observing deviations of only 1-2 seconds per day. One owner noted a discrepancy in the stated case thickness, with Hamilton listing 10.10mm. On balance, owners rate the Hamilton Jazzmaster Viewmatic Auto highly for its excellent value and versatile, classic design.

Seiko King Seiko KSK

Owners and reviewers widely praise the King Seiko KSK's sharp, faceted case design and harmonious mid-century aesthetic. Its compact 38.1mm or 37mm size and slim 10.7mm thickness are noted as highly wearable. However, accuracy is a point of contention, with one reviewer reporting a wide range of +25 to -15 seconds per day for the 6R31 movement, while others criticize the standard 6R movement as too thick and a departure from the brand's history. Water resistance is consistently cited as limited to 50 meters, and one owner reported misaligned screws on the caseback and clasp. On balance, owners and reviewers find the King Seiko KSK appealing for its design and wearability, though the movement choice and accuracy are significant drawbacks for some.

At a glance

13 of 29 specs differ
Diameter
Jazzmaster Viewmatic Auto40mm
King Seiko KSK38.3mm
Power Reserve
Jazzmaster Viewmatic Auto80h
King Seiko KSK72h
Water Resistance
Jazzmaster Viewmatic Auto50m
King Seiko KSK100m
MSRP
Jazzmaster Viewmatic Auto$995
King Seiko KSK$2,000

Full specifications

Case

5 specs
Diameter
40mm
38.3mm
Thickness
10.8mm
11.7mm
Lug-to-Lug
0mm
46mm
Lug Width
20mm
19mm
Water Resistance
50m
100m

Crystal & Dial

4 specs
Crystal Shape
Box
AR Coating
Anti-reflective coating on inner surface
Dial Color
Black
Lume
None
LumiBrite on Hands

Movement

3 specs
Caliber
H-10
6R55
Power Reserve
80h
72h
Jewels
0
24

Pricing

1 specs
MSRP
$995
$2,000
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