Well...we are in the rep world so literally everything is possible
I'm just saying what I have been told by Domi since he's my master watchbuilder
But if someone established a way to use a 7750 case and dial to fit in a 7753 why not...I just wonder how the quick date change should work then...maybe it won't
There is an a7753 which can mostly be seen in the PAM187 reps or some of the other PAM chrono reps.
If they are going to rep it with an a7750 at first an a7753 (or swiss doesn't matter) won't fit due to a slightly different sub dial position. So it has to be reped directly with an a7753 or we don't have the chance to switch to swiss unless one goes the franken way with a gen dial
I experienced with my last franken Seamaster Chrono (rep case) that the chrono pusher are, just as advertised with the gen, even usable under water (yepp...I'm a brave freak )