660 (DCLX) ebile ngwagamolele wa go thoma ka Sontaga, ngwaga wa pele ngwagengsome wa 660s, ngwaga wa bomasometshela ngwagengkgolo wa Ngwagakgolo 7, le ngwaga wa bomakgolo tshela masometshela ngwagengkete wa Ngwagakete 1.