• A pretty, vintage, silver coloured metal pin badge in good condition advertising the new compact fluorescent tube design bulb made at Tesla in Holesovice Prague which produced lightbulbs up until the 1990's. 

• By 1989, the company had nine lightbulb plants, which were located in Brno, Jablonec nad Nisou, Králíky, Lenešice, Ústí nad Labem and in Slovakia; Nové Zámky, Moldava nad Bodvou and Prievidza.

• The badge face is 2.8cm wide and has a long stick pin style fastener to the rear.