I found an old ocarina in a dump area in an old coal mining camp in the field behind where I live. It's made of a hard paste porcelain and I think it came from Austria? It was packed full of dirt and I used our water pick to clean it out. It freaks the dogs out when you play it. Just about every little artifact I find out there dates from the 1890s to the 1930s. The mine closed for good in 1938.