1x case back gasket 1x gaskets that fits under the metal plexi ring/bezel retaining ring. I bought these gaskets along with other items at auction, those people who saw the auction will have also seen the other Military Rolex and Omega cases in the other lots too which went far behold my comfort zone but well deserved prices. My budget would only stretch to the little lot I bought. My lot and the other lots were what looked like a British military watchmakers affects. These gaskets are what was actually used to fit on British military Rolex 5517 cases, I was expecting them to be past their best but condition is perfect, still with protective grease and as good as they were when new.