Museum Exhibits

Thank you Drazen! The Serbian Postal Authority issued this 'Museum Exhibits' 4v set for the 50th anniversary of the Herzegovina Museum in 2002, they were issued with tabs. This cover has a 14th cent. Italian Murano glass and a 10th cent. tombstone bearing the oldest Cyrillic inscription in the region. Where was the glass found?
Thank you Drazen! Here is a Greco-Illyrian helmet (c.5th-4th cent. BCE) and a silver bracelet from the same period. Are these items from the Katchanska tomb?