Piaggio introduced this type of rear light made of plastic in the 1970's. It offers a shapely fitting line and a very good illumination, also sideways.
The tail light was available in a version with cover/sealing rubber in grey or black.
The cover can also be removed and painted separately in the vehicle colour.
The tail light was used among other things. on Vespa Rally, TS, GTR and V50/PV (German models)