Side by side

Hamilton American Classic Valiant 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 American Classic Valiant Auto

Owners widely praise the Hamilton American Classic Valiant Auto for its classic design elements, such as the sunburst dial and Roman numerals, noting its suitability for everyday elegance and wearability under a cuff. One owner highlights the 39.5mm size and applied indices as a "hidden gem," while another appreciates the clean, simple design with thin Roman numerals. The watch is also commended for its comfortable bracelet and attractive lance hands, with confirmation that the bracelet is indeed changeable. Some owners note the date window's placement at three o'clock is a point of contention, and one owner reports the watch runs at approximately +6 seconds per day after ten years of intermittent use. On balance, owners rate the Hamilton American Classic Valiant Auto highly for its elegant, classic design and comfortable wearability at its price point.

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
American Classic Valiant Auto34mm
King Seiko KSK38.3mm
Power Reserve
American Classic Valiant Auto80h
King Seiko KSK72h
Water Resistance
American Classic Valiant Auto50m
King Seiko KSK100m
MSRP
American Classic Valiant Auto$645
King Seiko KSK$2,000

Full specifications

Case

5 specs
Diameter
34mm
38.3mm
Thickness
10.58mm
11.7mm
Lug-to-Lug
0mm
46mm
Lug Width
16mm
19mm
Water Resistance
50m
100m

Crystal & Dial

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

Movement

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

Pricing

1 specs
MSRP
$645
$2,000
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