~~~~~Please know that everything in this thread is my opinion and I don't want to present them as facts!~~~~~~~~
Well, as an old timer on this board I've seen the entire life cycle of the Asian 7750. From the early replicas with the old 21.600bph jewels version which were poorly finished up to the latest 28.800bph version and all the alterations the Chinese could make up.
One thing that clearly stands out when it comes to the Asian 7750 is that there are lovers and haters. The later are in the surplus! Especially the Asian 7750 with the running seconds at 6 gets a lot of negative attention. Not entirely without reason as the Chinese altered a perfectly designed movement (Valjoux 7750) to transfer the running seconds. They could have done that without compromising on the performance but they cut some corners and what you get is a relative unreliable movement when not taken care off properly. There are some modifications that can be done to it but I won't go in to that now.
What I do want to share is what a great movement the Asian 7750 is. Yes, it is great! In it's original configuration (12-9-6) it is at it's best as all the parts and functions work like they should. It is the basic configuration with the least chance of problems occurring.
So why is the Asian 7750 so notorious? Well theoratically it's not the movement itself but the condition under which it is assembled that causes most of the problems. 99% of all Asian 7750 movements are either dirty, dry, over oiled or a combination thereof. Ad poor quality checks /craftsman ship and you can ad loose screws, uneven hair spring coils, loose pallet stones and a lot of other stuff to the balance.
But what can you expect from a 300$ watch? In order to give us these beautiful reps for such low prices they have to cut expenses somewhere. If they would ad 8 hours of proper assembling and QC's the price would dramatically increase. And let's be honest. Most people don't care if their movement is clean and on par with the genuine.They are more concerned with the aesthetics. And for the few RWG nerds that are? There is The Zigmeister of every other watch maker.
So my point is: The Asian 7750 is in it's basic configuration a great movement and on par with the ETA 7750 if assembled and checked correctly. That does mean that sometimes parts needs to be cleaned, oiled or even replaced. But after that... just perfect.
Some nice pictures to conclude!
Mark
Here's a random picture of an Asian 7750 as can be found in almost all reps. Dirty and shabby...
Here's an Asian 7750 after a full clean and oiling with the screws replaced by silver ones.
Compare it to a factory delivered Chronometer ETA 7750
Side by side...
Performance of the Asian 7750
Performance of the Chronometer ETA 7750