1873 (MDCCCLXXIII) ebile ngwaga wa go thoma ka Laboraro, ngwaga wa bone ngwagengsome wa 1870s, ngwaga wa bomasomešupa tharo ngwagengkgolo wa Ngwagakgolo 19, le ngwaga wa bomakgolo seswai masomešupa tharo ngwagengkete wa Ngwagakete 2.