Vintage 10k gold & Pearls Phi Sigma Delta fraternity pin. Measures 7/8" x 3/8" and weighs 2.8 grams. Phi Sigma Delta, colloquially known as Phi Sig, was a fraternity established in 1909 with a predominantly Jewish membership at Columbia University. It eventually opened at least 47 chapters. The Fraternity merged with Zeta Beta Tau in 1970, retiring its original name (from Wikipedia). The pin is in very nice condition with no missing pearls and only modest wear. Stamped 10k along with I believe Balfour Co. maker's mark. Also stamped A-317. Please enlarge all pics for best details.