Well, I'm no Breitling expert, but I have some experience with PAM Daylights, I have put together few of them - A7750 3-6-9, A7753 and ETA 7753. So, here are few factoids about A7753 issues:
1. A7753 and modifed 3-6-9 A7750 have different height, and consequently different crown position - so cases are unfortunately not compatible, not saying it is impossible to put A7753 in A7750 3-6-9 case, but there must be some case modding involved
2. strangely enough, A7753 CAN take A7750 date wheel, and with A7750 date wheel, dial can also be taken from A7750 3-6-9 movement - for anyone not believing this I have picture attached of A7753 with A7750 date wheel installed
3. A7753 does not have possibility of setting date by going forward-and-backward around midnight because movement "maker" decided to save probably around 0,05 US$ and used date indicator driving wheel from 7750 movement instead of producing 7753 specific one - so, with this new part produced A7753 would have this possibility (same as ETA 7753).
I hope this clears some of questions posted here.
regards