Tink snowdomes?

These are currently on ebay and I'm wondering if anyone has any knowledge about them. The person selling them says they are from the fifties or sixties and they are only about 2 1/2" tall. I'm curious if they are real or not. The globe shape seems odd for that time period to me and I've never heard of or seen these before.
That doesn't mean they are fakes. It just means I don't know about them. Anyone care to enlighten me? I want to bid on one if I can confirm they are real.