Now showing: Oman - Postage stamps (1990 - 1999) - 9 stamps.
1. January WM: None Sheetsize: 50 Design: Mahmoud Roushdy Perforation: 12¾ x 12¼
![[The 5th Anniversary of Gulf Investment Corporation, type GN]](https://www.stampworld.com/media/catalogue/Oman/Postage-stamps/GN-s.jpg)
![[The 5th Anniversary of Gulf Investment Corporation, type GN1]](https://www.stampworld.com/media/catalogue/Oman/Postage-stamps/GN1-s.jpg)
24. March WM: None Sheetsize: 50 Design: Mahmoud Roushdy Engraving: Oriental Press. Bahrain. Perforation: 13
![[The 40th Anniversary of Airline "Gulf Air", type GO]](https://www.stampworld.com/media/catalogue/Oman/Postage-stamps/GO-s.jpg)
22. April WM: None Sheetsize: 50 Design: Mahmoud Roushdy Perforation: 11¼ x 11¾
![[Omani Ophiolite Symposium, type GP]](https://www.stampworld.com/media/catalogue/Oman/Postage-stamps/GP-s.jpg)
![[Omani Ophiolite Symposium, type GP1]](https://www.stampworld.com/media/catalogue/Oman/Postage-stamps/GP1-s.jpg)
30. April WM: None Sheetsize: 50 Design: Mohamed Bin Nizam Shah & Mahmoud Roushdy Perforation: 13
![[The 150th Anniversary of First Omani Envoy's Journey to U.S.A., type GQ]](https://www.stampworld.com/media/catalogue/Oman/Postage-stamps/GQ-s.jpg)
5. May WM: None Sheetsize: 50 Design: Mahmoud Roushdy Engraving: Courvoisier. Perforation: 11½ x 11¾
![[Sultan Qaboos Rose, type GR]](https://www.stampworld.com/media/catalogue/Oman/Postage-stamps/GR-s.jpg)
18. November WM: None Sheetsize: 2 Design: Mohamed bin Nizam Shah & Mahmoud Roushdy Perforation: 11¾
![[National Day, type ]](https://www.stampworld.com/media/catalogue/Oman/Postage-stamps/0235-b.jpg)
