Often when restoring earlier VESPA models, the main body of the rear light unit is usually still serviceable, but the lens and the gasket of the light unit has its better days behind it. We have rear light lenses available for a large variety of VESPA rear light unit manufacturers. The main body of the light assembly and its complementary lens should always be from the same manufacturer. If you try to mix different producers of rear light unit parts, there is never a guarantee of an exact, watertight fit. If, for example, you wish to mount an original SIEM lens onto the body of a SIEM "repro" rear light you will have to modify one or the other for a proper fit.