Side by side

Seiko King Seiko KSKvsZelos Skyraider 40 Skeleton

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

King Seiko KSK
SeikoKing Seiko KSK
MSRP $3,300
Skyraider 40 Skeleton
ZelosSkyraider 40 Skeleton
MSRP $1,999

At a glance

14 of 29 specs differ
Diameter
King Seiko KSK38.6mm
Skyraider 40 Skeleton40mm
Power Reserve
King Seiko KSK45h
Skyraider 40 Skeleton40h
Water Resistance
King Seiko KSK50m
Skyraider 40 Skeleton50m
MSRP
King Seiko KSK$3,300
Skyraider 40 Skeleton$1,999

Full specifications

Case

6 specs
Category
Dress
Skeleton
Diameter
38.6mm
40mm
Thickness
10.7mm
8.2mm
Lug-to-Lug
45.8mm
40mm
Lug Width
19mm
20mm
Material
Stainless Steel
Titanium

Crystal & Dial

3 specs
Crystal Shape
Box
Flat
AR Coating
Anti-reflective coating on inner surface
Inner
Dial Color
Black
Ti Damascus LE

Movement

4 specs
Caliber
6L35
Swiss Skeletonised Marvin 700
Type
Automatic
Manual
Power Reserve
45h
40h
Jewels
26
25

Pricing

1 specs
MSRP
$3,300
$1,999

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

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.

Zelos Skyraider 40 Skeleton

The Zelos Skyraider 40 Skeleton is noted for its skeletonized dial and the use of BGW9 and C3 Super-LumiNova for legibility. It is powered by a manual-wind ETA 6498 movement, offering a 44-hour power reserve. On balance, the Zelos Skyraider 40 Skeleton is seen as a cool-looking option, though availability is a factor.

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