Side by side

Seiko 5KXvsLongines HydroConquest 43mm

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.

Seiko 5KX

Owners widely praise the Seiko 5 Sports SKX series for its strong lume and comfortable wearability, with many noting its compact feel due to a short lug-to-lug length. The NH36 movement's accuracy varies, with typical performance between +/-5 to 10 seconds per day, though some report better. A lack of screw-down crown and ISO certification are noted drawbacks for its water resistance. Some owners find the bracelet to be of cheaper construction with hollow links, and a few have reported quality control issues. The consensus is that the Seiko 5 Sports SKX series offers good value for its price, appealing to those who appreciate its tool-like nature and iconic lineage.

Longines HydroConquest 43mm

Owners widely praise the Longines HydroConquest 43mm for its flashy design, refined case proportions, and tactile bezel clicks, with many finding it a beautiful watch that offers great value. Accuracy is noted as near chronometer specifications, with one owner reporting it losing only 2 seconds per day. However, some find the bezel scratchy, strap changes difficult, and the crown guard uncomfortable. The standard bracelet is criticized for its lack of taper and tool-less micro-adjustment, with some owners preferring aftermarket options for improved wearability. On balance, owners rate the Longines HydroConquest 43mm highly for its striking aesthetics and strong value proposition at the price point.

At a glance

15 of 29 specs differ
Diameter
5KX42.5mm
HydroConquest 43mm43mm
Power Reserve
5KX41h
HydroConquest 43mm
Water Resistance
5KX100m
HydroConquest 43mm
MSRP
5KX$350
HydroConquest 43mm$4,700

Full specifications

Case

6 specs
Diameter
42.5mm
43mm
Thickness
13.4mm
0mm
Lug-to-Lug
46mm
0mm
Lug Width
22mm
0mm
Water Resistance
100m
Caseback
Solid

Crystal & Dial

4 specs
Crystal
Hardlex
Sapphire
Dial Color
Matt black ceramic
Indices
Applied
Lume
LumiBrite on hands and index(es)
None

Movement

4 specs
Caliber
4R36
Power Reserve
41h
0h
Jewels
24
0
Complications
None
Date

Pricing

1 specs
MSRP
$350
$4,700
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