1. Philatelic 72/22/1/11 Reference (shelfmark): Philatelic 72/22/1/11 Title: The People's Republic of China Postage Stamp Issue: Revolutionary Ballet Hsi-er Scope & Content: Stamps designed by Yin Dingbang and Yang Baizi. Manufactured by the Beijing Postage Stamp Printing Works using a photogravure printing process. Collection Area: Philatelic Collections Languages: English Date Range: 25 Sep 1973 Extent: 4 Items