One genuine Rolex clasp for Rolex 20mm Two Tone Oyster-quartz 17013. The clasp works for both Oyster and Jubilee. The clasp is in good condition with a bold coronet. I included the pin for attaching. The clasp measures 16mm but fits a 20MM bracelet (Rolex bracelets taper from 20mm at the head down to 16mm at the clasp)