Ok, so I just received an IWC 3717 from EL the other day. It's an amazing watch.
One problem though. When I unscrew the crown, all is fine: it reassuringly unscrews, and I can wind the watch, change the day, date and the time. However, when I push the crown in, so it connects with the thread on the case, I find it very difficult to screw the crown down, even though it is pushed in and threaded. There's a lot of resistance after the first turn and, also, with each turn, I can hear and feel that it is still winding the watch. I still haven't managed to screw the crown down completely because there's too much resistance. The problem exists no matter what time the watch it set at. The threads look to be intact, but I can't be sure because they are tiny.
I have a IWC GST, which behaves differently. When I push in the crown on that watch, it latches onto the thread and very reassuringly screws down very tightly, without winding the watch further.
So what's up with my 3717? Is it fracked?
Hopefully I've described the problem fully --- but let me know if anything is unclear.
Thanks.