Side by side

Seiko 5KXvsYema Flygraf Bi-Compax French Air Force

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

5KX
Seiko5KX
MSRP $350
Flygraf Bi-Compax French Air Force
YemaFlygraf Bi-Compax French Air Force
MSRP $490

At a glance

13 of 29 specs differ
Diameter
5KX42.5mm
Flygraf Bi-Compax French Air Force40mm
Power Reserve
5KX41h
Flygraf Bi-Compax French Air Force40h
Water Resistance
5KX100m
Flygraf Bi-Compax French Air Force100m
MSRP
5KX$350
Flygraf Bi-Compax French Air Force$490

Full specifications

Case

6 specs
Category
Diver
Chronograph
Diameter
42.5mm
40mm
Thickness
13.4mm
9.5mm
Lug-to-Lug
46mm
Lug Width
22mm
20mm
Material
Stainless Steel
316L Stainless Steel

Crystal & Dial

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

Movement

4 specs
Caliber
4R36
Type
Automatic
Quartz
Power Reserve
41h
40h
Jewels
24
25

Pricing

1 specs
MSRP
$350
$490

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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 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.

Yema Flygraf Bi-Compax French Air Force

Owners widely praise the Yema Flygraf Bi-Compax French Air Force for its attractive, toolish aesthetic and excellent quality for the price, noting the legible Type A dial and 40mm titanium case. However, the acrylic crystal scratches easily, and the titanium case is prone to marking. The mecha-quartz movement's chrono timer sweeps rather than ticks, and one owner questions the purpose of the oversized crown. The in-house Yema 2000 movement is accurate at +/- 10 seconds per day but has a 42-hour power reserve, and some owners express concerns regarding Yema's past quality control and customer service. On balance, owners rate the Yema Flygraf Bi-Compax French Air Force highly for its attractive design and value, despite concerns about material durability and brand service history.

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