Moms Dream Vintage Finds Shop › USC (University of Southern California) Sterling Men’s Tie Tack Image 1 of 4 Image 2 of 4 Image 3 of 4 Image 4 of 4 USC (University of Southern California) Sterling Men’s Tie Tack $20.00 Shaped like a diamond with an oval that reads USC in the center. The back piece is in good shape. Excellent condition! Add To Cart Added! Shaped like a diamond with an oval that reads USC in the center. The back piece is in good shape. Excellent condition!