They are from a lady in Argentina that said she got them from her Grandmother and doesn't know the origin. Haven't figured it out yet. 10.00 a set shipped if interested, email me.
Out of US, will be 12.00 shipped. Threw in person to help judge size and will send with set if I haven't sent you one already. They are some type of plastic. Front and back prictured below of one of the sets.