I don’t know exactly how old this is but it’s somewhere between the mid to late 1800’s. I found only one that looked like it was made by the same maker and it also is believed to be civil war era. I also believe this based on the suit style the man in the photograph is wearing. The initials on the back I believe are SAF. There is a little debris under the glass that should be cleaned out but I will leave that to the experts. I was told it is gold filled. It is a stunning brooch perfect for any collector!