He got the watch during 2010 brand new and I believe that it is a ETA 2824-2 movement. He got this weird wearing habit where he does not pull out the crown the adjust the date at all. After a long period of time, the crown seems to be stuck and when he tried to pull out the crown. It came off from the stem.
Seems like a good time to do servicing as well but because my father is retired, he does not want to spend too much money servicing the watch. So he is trying get his watch serviced at a competent watch maker. He has not do so yet but wondering whether can the crown be reuse, because the 3rd party watch maker may not have ready access to Oris parts.