Side by side

Sartory Billard SB05vsSeiko King Seiko KSK

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

King Seiko KSK
SeikoKing Seiko KSK
MSRP $2,000

At a glance

14 of 29 specs differ
Diameter
SB0538.5mm
King Seiko KSK38.3mm
Power Reserve
SB0590h
King Seiko KSK72h
Water Resistance
SB0550m
King Seiko KSK100m
MSRP
SB05
King Seiko KSK$2,000

Full specifications

Case

5 specs
Diameter
38.5mm
38.3mm
Thickness
8.5mm
11.7mm
Lug-to-Lug
45.5mm
46mm
Lug Width
20mm
19mm
Water Resistance
50m
100m

Crystal & Dial

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

Movement

4 specs
Caliber
LJP Cal. 7380
6R55
Type
Manual
Automatic
Power Reserve
90h
72h
Jewels
25
24

Pricing

1 specs
MSRP
$2,000

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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.

Sartory Billard SB05

The dial's Maki-e Raden and aventurine combination is a standout feature. The 38.5mm case size and slim profile are noted for comfort.

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.

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