1. Philatelic 72/167/7/11 Reference (shelfmark): Philatelic 72/167/7/11 Title: Oman Postage Stamp Issue: National Day Scope & Content: Stamps designed and manufactured by Harrison and Sons Limited using a lithography printing process. Collection Area: Philatelic Collections Languages: English Date Range: 18 Dec 1976 Extent: 4 Items