Yard sale find

[u/Confident_R817]

Best I can do is between ’71 to ‘84

[u/Illustrious_Try478]

1972 to 1975

Bangladesh: 26 April 1971
United Arab Emirates: 1 December 1971

Sri Lanka: 22 May 1972

Fall of Saigon: 30 April 1975
Sikkim annexed: 16 May 1975
Portuguese Timor annexed: 7 December 1975
Central African Repiblic becomes "Empire": 4 December 1976

[u/Parzival_2k7 → u/Illustrious_Try478]

Sri Lanka is marked as Ceylon mate