That should fit without any mods imo. Gen is a top grade ETA7750, which's day-date wheels are fully compatible with the A7750.
I could be wrong though.
It won't fit. 100% sure. The gen uses ETA2892-2 + DD chrono module on top of it, which means the pushers and crown are not inline. On the rep, they are. Gen dial will fit only the gen movement, and the gen movement won't fit the rep case.
Sorry, I confused you. I wrote at first "at this price (if I remember right 488 + shipping)..."
I knew yours was that much. I'm 99% certain that it's the older, 17 Jewels version, but you should get it checked
Greetz.
Nice but for a little more (if I remember right 488 + shipping) you could get one with 25J movement not 17J. Those are nearly 20 years old.
Enjoy your watch anyway, it's a nice piece.
Greetz.