Side by side

Seiko King Seiko KSKvsLongines MASTER COLLECTION MOONPHASE

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
MASTER COLLECTION MOONPHASE
LonginesMASTER COLLECTION MOONPHASE
MSRP $3,500

At a glance

19 of 29 specs differ
Diameter
King Seiko KSK38.6mm
MASTER COLLECTION MOONPHASE34mm
Power Reserve
King Seiko KSK45h
MASTER COLLECTION MOONPHASE
Water Resistance
King Seiko KSK50m
MASTER COLLECTION MOONPHASE30m
MSRP
King Seiko KSK$3,300
MASTER COLLECTION MOONPHASE$3,500

Full specifications

Case

8 specs
Category
Dress
Moonphase
Diameter
38.6mm
34mm
Thickness
10.7mm
11.2mm
Lug-to-Lug
45.8mm
49.7mm
Lug Width
19mm
21mm
Finish
Brushed and polished
Water Resistance
50m
30m
Caseback
Solid

Crystal & Dial

4 specs
Crystal Shape
Box
AR Coating
Anti-reflective coating on inner surface
Dial Color
Black
Silver
Indices
Applied

Movement

6 specs
Caliber
6L35
L899.5
Beat Rate
28,800 vph
0 vph
Power Reserve
45h
0h
Jewels
26
0
Hacking
Yes
No
Hand-winding
Yes
No

Pricing

1 specs
MSRP
$3,300
$3,500

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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.

Longines MASTER COLLECTION MOONPHASE

Owners widely praise the Longines Master Collection Moonphase for its beautiful, legible, and mesmerizing dial, with one owner noting it balances class and complexity. The watch offers old-world charm and a romantic moonphase complication, with the Caliber L899 movement providing a 64-hour power reserve. Some owners find the $3k price point high, suggesting better value exists elsewhere, while others acquired it for around $1700 USD. One owner notes the 40mm size is a perfect fit for a 6.75-inch wrist, though its limited water resistance makes it unsuitable for adventurous wear. On balance, the consensus is that the Longines Master Collection Moonphase is highly regarded for its classic design and attractive moonphase complication at its price point.

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