1. Philatelic 72/23/1/50 Reference (shelfmark): Philatelic 72/23/1/50 Title: The People's Republic of China Postage Stamp Issue: 400th Birth Anniversary of Xu Xiake Scope & Content: Stamps designed by Gao Jun. Manufactured by the Beijing Postage Stamp Printing Works using a photogravure printing process. Collection Area: Philatelic Collections Languages: English Date Range: 20 Feb 1987 Extent: 3 Items