Designer vintage costume jewelry is in ample supply at Twentieth Century Ltd., including tiaras, brooches, cultured pearls, estate jewelry, and Art Deco pieces. The store prides itself on a large selection of pieces by Miriam Haskell, a well-known designer of costume jewelry. The shop also carries pieces by Hattie Carnegie, Coro, and other sought-after designers. The layout of the shop is welcoming and easy to navigate: pieces are showcased in glass displays organized by style or designer.