They are made for watch bands in the traditional Oyster watch bands which has 19mm or 20mm end piece. 17MM CLASP BUCKLE FOR ROLEX DATEJUST WATCH BAND JUBILEE 62510H OYSTER SUBMARINER. FLIPLOCK DIVER CLASP 93150 FOR ROLEX GMT EXPLORER 16700 16718 OYSTER BAND SHINY.
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