During the 60s and 70s, SIEM was the equipment supplier for many models Vespa for the lighting part: rear lights, headlights, indicators and switches….
The brand disappeared from the market for almost twenty years. Italian society GRABOR GM (also equipment manufacturer for Piaggio) buys the brand and restarts production. Many copies of more or less good quality appear on the market, only SIEM products bear the brand logo on the optics.
Choose Italian quality for your Vespa by choosing the products SIEM.