The picture shows a view of this Unusual Old OAJC Costume Jewelry Brooch Pin with Stones. This pin is not dated and the year that it was made is unknown. The hollow back is simply marked ''OAJC''. It is made of an unknown silver colored metal. The design is of a person with their head in their hand. The top of their scalp is peeled back and there are clear stones inside for brains. It would make a nice gift for a brain surgeon or Psychiatrist. It seems like an unusual contemporary design. The brooch or pin measures about 1-1/8'' x 1-7/8''. It appears to be in near mint to mint condition as pictured.