I'm not sure thats entirely accurate as I have some reps with 3 spokes, I found this pic that shows reps too have 3 spokes.
Interesting. I learned something new today. All mine have 4 spokes but I guess they are all newer hi-beat from the same factory. The original early lo-beat movements did come from a different Chinese factory than the later hi-beats and had a spotty reputation, at best.
Here's what most are like. Taken from Ziggy's tear down and service review of the A7750:
For those interested,the full review is here: http://www.watchreport.co/7750-asian-eta-replica-watches
Please note that this site's reviews of other replica sales sites cannot be trusted.
EDIT: I just noticed that your picture was from 6497 movements. :lol: