Antique 14k Univ. of Wisconsin 1912 Phi Delta Theta Pin

1912 Phi Delta Theta Fraternity Univ. of Wisconsin. Natural old mine cut diamond, and 16 vibrant real opals. All cut by hand. The back reads: R.W. Kullman, PaB. 1912. The mfg.stamp is present. Custom handmade stones. Phi Delta Theta was founded in 1848. Great condition. 14k solid gold. Rare and valuable.