There's an interesting story about this tram cars. In 1993, depot in Grudziądz was burned down. Governor of Torun gave money and ordered 6 new trams from Konstal. Konstal switched bogies to 1000mm track gauge for 6 of 105Nb trams, which were ordered for Warsaw, and send them to Grudziądz. That's how first and last 6 of 805Nb in world were made. I think you'll be able to understand my poor English ;)