There is no precise dating of the ''Olo'' models, although usually you can take as a reference the corresponding models of the [[Aurora]] production of which they were a kind of cheap version; they are easily recognizable by clips shapes and materials entirely similar to those of the respective [[Aurora]] models. | There is no precise dating of the ''Olo'' models, although usually you can take as a reference the corresponding models of the [[Aurora]] production of which they were a kind of cheap version; they are easily recognizable by clips shapes and materials entirely similar to those of the respective [[Aurora]] models. |