Side by side

Brillier FliegervsSeiko 5KX

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

Some links are affiliate links — lug2lug may earn a commission at no extra cost to you. Disclosures

Some links are affiliate links — lug2lug may earn a commission at no extra cost to you. Disclosures

What people say

Owners + reviewers, side by side

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

Brillier Flieger

Owners widely praise the Brillier Flieger's well-brushed stainless steel case and its 39mm size, though some find the 13mm thickness a bit substantial. Accuracy is consistently reported as exceptional, with readings around +0.4 seconds per day. Opinions are split on the lume, with one owner describing it as "INTENSE" and fully lumed, while another found it weak and short-lasting. The included straps are generally considered undesirable. Overall, owners rate the Brillier Flieger highly for its excellent accuracy and case finishing at the price point.

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.

At a glance

11 of 29 specs differ
Diameter
Flieger39mm
5KX42.5mm
Power Reserve
Flieger
5KX41h
Water Resistance
Flieger100m
5KX100m
MSRP
Flieger$795
5KX$350

Full specifications

Case

5 specs
Category
Diver
Diameter
39mm
42.5mm
Thickness
13mm
13.4mm
Lug-to-Lug
48mm
46mm
Lug Width
20mm
22mm

Crystal & Dial

2 specs
Crystal
Sapphire
Hardlex
Lume
None
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
Seiko 4R36
Power Reserve
0h
41h
Jewels
0
24

Pricing

1 specs
MSRP
$795
$350
Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Follow this matchup

Get a note when Brillier Flieger vs Seiko 5KX gets more votes, a community discussion, or a price drop. No account needed.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.