I use this kind of rubber ball to place the casebcak into the right position and to screw the caseback so that it's closed enough to place the watch on winding machine and check accuracy for some days...

Before it goes on the wrist, or WP-test...I close it like it should be closed.

Mark also touches a very important topic here...the dust problem...obviously dust can be a watch worst nightmare...

Cheers,
Abel.

: I say "Please open this Mr Watchmaker" :)

: I could get one of those rubber balls, I suppose, I do quite like
: to see the movements but then I also don't want to get dust in
: there either.

: I saw one watch on eBay recently where the caseback appeared to
: have been opened with a bottle top, there were deep
: "toothmarks" gouged into it. I'm with you, I don't
: like it when a caseback (or worse, the case itself) has been
: marked by clumsy opening.