No way, the only question is whether it's medieval or Roman. It's really chunky which makes me inclined to go with the latter also it came from a field that has turned up 30 Roman coins.
Yes. I've found three items which are classed as Treasure Trove which go to the coroner for a valuation and then are offered to local museums. Got two of these back but one, a silver and gilt Tudor clothes fastener is now in Epping Forest District Museum. Probably in a drawer. I let them have it for free.