Hi Ezio (actually, do you know that Ezio is a typical Italian "old style" name?)
what I can say about the A7750 (got info reading and reading) it's:
Running seconds subdial should by @9 (like in the Panerai, in the TAG, NOT like in the IWC Portuguese or in the Rolex Daytona) and not in other places (the other subdials aren't that important)
Avoid, if possible, to hand-wind them. If it's not possible, do it SLOWLY and just until it start runs by itself, then wear it and let the automatic winding to do the rest of the job
Never set the date or the day between 21 and 3 (9pm - 3am), if you've to set the date and you're in that interval, change the time to 5pm or 4am, change the day-date, then put it to the correct time. But avoid to set the time counterclockwise
If you run the chrono, then reset it by 1st pressing the stop button and then the reset button (never use the reset while it's still running). Reset the chrono when the chrono seconds hand is between 10 and 2, to avoid the risk of misalignment.
That's all