Antique Victorian Cameo Portrait Hand Painted Porcelain Gold Brooch Pin 1870's

Antique Victorian Cameo Portrait Hand Painted Porcelain Gold Brooch Pin 1870's. I was told it was from the 1870's. Came out of an estate in Illinois from a house built in 1860. Metal is either gold filled or rolled gold. Porcelain has a number stamped on the back not sure what that means.

Weight of the brooch is 10 grams. Brooch measures 1.5 inches long. Very unique and old piece, I hope it finds a good home.