I know probably new 7750 work good. But, I saw my local watchmechanic photo of overhauling new7750.
That watch is not dirty to work in photo. However, Cleaning is not profitable to work long use.
Another photo showed me assembling part's wrong. This one work correctly except chrono part gear.
(this is big problem to me. I wanna buy this watch to use chrono often.)
So, watchmechanic of my city recommend overhaul to use longtime.
I love my watch. No problem either gen or replica. also, I wanna to use long day!