This is exceptional and came like a revelation! When wondering when this beautiful piece of silver work was made I first thought made in the renaissance or possibly even as recent as art nouveau . . . . . . but I sensed a certain Celtic influence and wondered about early Scottish . . . . . . . . . 

Isn't it beautiful?

THE ANSWER?

Check this:

Celtic silver jewellery made by the Scordisci tribe – fibulae of “Jarak” type, two “foxtail” chains, rings and jewellery box ornately garnished with a filigree technique and decorated with semi-precious stones, 

2nd - 1st century BC, found at an Oppidium - Celtic hillfort at Židovar (Serbia)