Oman Timline (01-Jan-1931 - 31-Dec-1940)

3as
Title: Insurance Fees: 1933 to 1939 Postal Administration: Indian Postal Administration
Earliest Usage: 07-Oct-1933 Latest Usage: 16-Jun-1939
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6as
Title: USA: 6as Air Fee – 1931 to 1939 Postal Administration: Indian Postal Administration
Earliest Usage: 01-May-1931 Latest Usage: 01-Sep-1939
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18as
Title: USA: 18as Air Fee – 1939 to 1945 Postal Administration: Indian Postal Administration
Earliest Usage: 02-Sep-1939 Latest Usage: 01-Jan-1945
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4as
Title: USA: 4as Internal US Air Service for Indian Mails Postal Administration: Indian Postal Administration
Earliest Usage: 01-Apr-1935 Latest Usage: 21-Feb-1940
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40as
Title: USA: 40as Air Fee – 1940 (February to December) Postal Administration: Indian Postal Administration
Earliest Usage: 21-Feb-1940 Latest Usage: 20-Dec-1940
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30as
Title: USA: 30as Air Fee – 1940 (April to June) Postal Administration: Indian Postal Administration
Earliest Usage: 29-Apr-1940 Latest Usage: 14-Jun-1940
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55as
Title: USA: 55as Air Fee – 1940 to 1941 Postal Administration: Indian Postal Administration
Earliest Usage: 21-Dec-1940 Latest Usage: 22-May-1941
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45.5as
Title: USA: 45.5as Air Fee – 1940 to 1941 Postal Administration: Indian Postal Administration
Earliest Usage: 21-Dec-1940 Latest Usage: 22-May-1941
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6as
Title: USA: Postcard 6as Air Fee – 1931 to 1933 Postal Administration: Indian Postal Administration
Earliest Usage: 01-May-1931 Latest Usage: 01-Apr-1933
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4as
Title: USA: Postcard 4as Air Fee – 1933 to 1939 Postal Administration: Indian Postal Administration
Earliest Usage: 30-Apr-1933 Latest Usage: 01-Sep-1939
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8as
Title: USA: Postcard 8as Air Fee – 1939 to 1945 Postal Administration: Indian Postal Administration
Earliest Usage: 02-Sep-1939 Latest Usage: 01-Jan-1945
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15.5as
Title: USA: Postcard 15.5as Air Fee – 1940 (February to December) Postal Administration: Indian Postal Administration
Earliest Usage: 21-Feb-1940 Latest Usage: 20-Dec-1940
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20.5as
Title: USA: Postcard 20.5as as Air Fee – 1940 to 1941 Postal Administration: Indian Postal Administration
Earliest Usage: 21-Dec-1940 Latest Usage: 07-Dec-1941
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17as
Title: USA: Postcard 17as as Air Fee – 1940 to 1941 Postal Administration: Indian Postal Administration
Earliest Usage: 21-Dec-1940 Latest Usage: 22-May-1941
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POSTAGE DUE
Title: Postage Due "T" Marks used on Mail from Muscat Post Office
Earliest Usage: 27-Mar-1939
Latest Usage: 27-Mar-1939
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