Thanks for the info. I have a couple of cases missing the crystal and tension ring. I also have a couple of complete cases so I may look at measuring them up and getting some tension rings made. Do you know if the gaskets are available?

Regards

: Unfortunately not, and I think you will never find one (never seen
: them sold as spare parts).
: I usually avoid spare cases without the glass because usually they
: don't have the tension ring installed !!

: Be careful as there are two different types of spacers (tension
: ring) fitted on the 11630: the primer goes INSIDE the gasket
: while the latter one goes BELOW the gasket.

: I suggest to find a good artisan or a skilled watchmaker, it can be
: redone with anodised aluminium and lathe, but will not be cheap
: and, above all, you need the old one (even if damaged) to be
: copied.
: Best.
: G