Side by side

Seiko King Seiko KSKvsLongines HYDROCONQUEST GMT

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
HYDROCONQUEST GMT
LonginesHYDROCONQUEST GMT
MSRP $3,350

At a glance

13 of 29 specs differ
Diameter
King Seiko KSK38.6mm
HYDROCONQUEST GMT41mm
Power Reserve
King Seiko KSK45h
HYDROCONQUEST GMT40h
Water Resistance
King Seiko KSK50m
HYDROCONQUEST GMT300m
MSRP
King Seiko KSK$3,300
HYDROCONQUEST GMT$3,350

Full specifications

Case

6 specs
Category
Dress
Diver
Diameter
38.6mm
41mm
Thickness
10.7mm
12.9mm
Lug-to-Lug
45.8mm
49.4mm
Lug Width
19mm
21mm
Water Resistance
50m
300m

Crystal & Dial

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

Movement

3 specs
Caliber
6L35
L844.5
Power Reserve
45h
40h
Jewels
26
25

Pricing

1 specs
MSRP
$3,300
$3,350

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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 HYDROCONQUEST GMT

Owners widely praise the Longines HYDROCONQUEST GMT for its excellent finishing, smooth winding action, and overall value, with some finding its build quality and colorways superior to higher-priced competitors. Reviewers and owners alike note its robustness as a traveler's dive watch with a true GMT movement. Some owners find the round markers at 6 and 9 disrupt dial symmetry, and the GMT hour markers are described as tiny and difficult to read. The date wheel can be mismatched on certain dial colors, and the bracelet clasp is noted as sharp by one reviewer. While some owners wish for a smaller case size, others find the 41mm comfortable. The bezel action is flagged as having bounce-back by one owner, though the brushed finish effectively hides wear. Overall, owners and reviewers rate the Longines HYDROCONQUEST GMT highly for its robust build and excellent value proposition.

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