I think it goes to the central messing fund. It used to be at Wroughton but being as Wroughton is no more (I travelled there for a station volleyball match, seems like yesterday) I haven't a clue where it might be. When squadron numbers are reactivated for reserve reasons I think they dust it off and reissue it. The Navy have a similar deal where their silver finishes up somewhere in Portsmouth which is not too heavily advertised for obvious reasons.