my 352. Watch is six months old. Three weeks ago while changing strap, the button popped out. Sent it in and was told it will take about three weeks for repair. Got the watch back few days ago repaired but on the same day, the same button popped out again...
Hopefully it won't take long. Oh yeah, keep in mind that basically all the watch companies in Switzerland are closed down for holidays so that might delay your repair a little bit. Cheers, Anthony PS. Welcome to PuristSPro!