Dear Hive mind I would be very grateful of your help in identifying some marks on a bracelet Looks to be AL Crown C18 F Doesn't seem to match the more common hallmarks. Any clues? TIA. https://i.imgur.com/3mDOLeE.jpg https://i.imgur.com/fMKOPRD.jpg https://i.imgur.com/Zk3iS0e.jpg