Hi, it looks like a nice 1153n to me. I think that hands are fine. The long sweep hand would have been orange originally but is now faded. It may well have been a calibre 11 originally too but it is not uncommon for them to have been replaced with a calibre 12, such as yours. Here is mine-
Same execution along with the hands and calibre 12 also the same as yours. Mine has a red sweep hand as you can see but that is incidental.
I suspect in both these Carreras the movement and hands were changed during serving but both are commonly accepted as genuine changes.
I think yours is a good honest piece at a good price in the current market. The serial may tell something more but I doubt it will change anything said above.
Good luck!
Steve
ps the only thing I will add is that it is tough to see the case condition. It would normally have a vertical brushed finish, that you can't really see in my photo either.
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