1. Philatelic 72/167/7/81 Reference (shelfmark): Philatelic 72/167/7/81 Title: Oman Postage Stamp Issue: Omani Ophiolite Symposium, Muscat Scope & Content: Stamps designed by M. Rushdi. Manufactured by Imprimerie Courvoisier SA, Switzerland using a photogravure printing process. Collection Area: Philatelic Collections Languages: English Date Range: 22 Apr 1990 Extent: 2 Items