I have two, large, absolutly beautiful knobs. These are the main tune and bandspread knobs that fit the S-38, S-38A, S-38B, S-40, S-40A, SX-43, SX-46, S-51, S-52, S-53, SX-71 AND S-76. These are the ones with the silver insert. $12.00/each plus shiping. I have a picture of them if interested. Regards Gary...WZ1M