| T I M E L I N E [1971 - 1980] |
| 16-Jan-1971 |
The 1971 Definitive Issue – The Sultanate of Oman Overprints - Overprint Varieties |
| 17-Jan-1971 |
The 1971 Definitive Issue – Inverted Overprint - The Sultanate of Oman Overprints |
| 23-Jul-1971 |
National Day – 1971 |
| 01-Nov-1971 |
1971 Definitive Surcharge - Plate Error |
| 25-Dec-1971 |
25th anniversary of UNICEF - 1971 |
| 06-Jan-1972 |
International Book Year - 1972 |
| 01-Mar-1972 |
The 1971 Definitive Issue – Harrison overprints of 1972 |
| 06-Jun-1972 |
The 1972 Surcharges - 25 Baizas on 1 Rupee |
| 01-Jul-1972 |
The 1972 Surcharges - Missing 5 |
| 23-Jul-1972 |
The 1972 Definitive Issue |
| 23-Sep-1973 |
Ministerial Complex Opening Without Date - 1973 |
| 18-Nov-1973 |
National Day - 1973 |
| 30-Jul-1974 |
Inauguration of Port Qaboos - 1974 |
| 08-Sep-1974 |
International Eradication of Illiteracy - 1974 |
| 09-Oct-1974 |
Centenary of Postal Union - 1974 |
| 08-May-1975 |
Eradication of Illiteracy (Arab World) - Imperforated - 1975 |
| 18-Nov-1975 |
National Day - 1975 |
| 27-Dec-1975 |
International Woman's Year - 1975 |
| 18-Nov-1976 |
National Day - 1976 |
| 06-Jan-1977 |
Save Moenjodaro Monuments - 1977 |
| 12-Apr-1977 |
25th Anniversary of Arab Postal Union – 1977 |
| 18-Nov-1977 |
National Day - 1977 |
| 30-Jul-1978 |
Commemorative Surcharges - Inverted Overprint - 1978 |
| 01-Nov-1978 |
Al-Hajj 1398 - 1978 |
| 18-Nov-1978 |
National Day - 1978 |
| 22-Mar-1979 |
The Arabs - 1979 |
| 28-Oct-1979 |
International Year of the Child - 1979 |
| 18-Nov-1979 |
National Day - 1979 |
| 11-Dec-1979 |
Armed Forces Day - 1979 |
| 09-Nov-1980 |
15th Century of Hijri Year 1400 - 1980 |
| 18-Nov-1980 |
10th National Day - 1980 |
| 11-Dec-1980 |
Armed Forces Day - 1980 |
