1937
Airmail – Overprinted “Correo Aéroe D.S. 25-2-37” & Surcharged


[Airmail - Overprinted "Correo Aéroe D.S. 25-2-37" & Surcharged, type BL4]


[Airmail - Overprinted "Correo Aéroe D.S. 25-2-37" & Surcharged, type BH6]


[Airmail - Overprinted "Correo Aéroe D.S. 25-2-37" & Surcharged, type BH7]


[Airmail - Overprinted "Correo Aéroe D.S. 25-2-37" & Surcharged, type BH8]


[Airmail - Overprinted "Correo Aéroe D.S. 25-2-37" & Surcharged, type AV9]


[Airmail - Overprinted "Correo Aéroe D.S. 25-2-37" & Surcharged, type BB1]


[Airmail - Overprinted "Correo Aéroe D.S. 25-2-37" & Surcharged, type BC1]


[Airmail - Overprinted "Correo Aéroe D.S. 25-2-37" & Surcharged, type BD1]


[Airmail - Overprinted "Correo Aéroe D.S. 25-2-37" & Surcharged, type BE1]


[Airmail - Overprinted "Correo Aéroe D.S. 25-2-37" & Surcharged, type AV10]


[Airmail - Overprinted "Correo Aéroe D.S. 25-2-37" & Surcharged, type AV11]

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