Hi Guys,
Sorry, but i guess this question has been asked before.. not having any luck finding the answer though.
My father in law has a Breitling Navitimer with an asian 7750 Valjoux 28.800 he bought from a respected dealer in this forum.
It is very difficult to impossible to get it to run right... it is always running to fast or to slow. A watchmaker also tried.
Now he has his eye set on a IWC Portuguese with the improved 29J version of the same asian 7750 valjoux 28.800. We are concerned that he will experience the same difficulties with this one. We can read the that this is the improved 29J version, but is this really more eliable?