AFAIK the sec@12 case is contructed just like the gen and because of that, it can't be solid rubber. The screws you see on the bezel go all the way through the case and are fixed on the caseback with corresponding nuts. The force on these screws would pull them through the rubber.
Review - Audemars Piguet ROO Rubberclad
in The Audemars Piguet Area
Posted
that is such a nice piece man.