Until administrative issues will be solved I will tell you that the label means glassworks ZBS - Zeleznobrodske sklo, and country destination Czech republic means that this piece was fabricated from 1993 up to now. Before ZBS used label with Czechoslovakia.
Zelezny Brod is small town in northern Bohemia where is located secondary glass making school .
Famous teachers were profs Cerny, Brychta, Klinger - famous graduate is Frantisek Vizner, for example.
Jindrich