Our local antique shop has in stock a medieval (15th century) belt buckle. It's made of copper alloy and looks in extremely good condition considering it's been in the ground for several hundred years. I figured it would be pretty cool to use it to make a belt out of for occasional use at re-enactment events. Can anyone tell me the likely metallurgical consequences of its time in the ground, and whether it would be silly to think it could be brought back into use?
Thank you in advance.