India
Inland letter Used as Aerogramme


Indian "Inland Letters" are not domestic aerogrammes as transfer by air mail is not promised. Apart from that they share some key features with aerogrammes:

• letter and envelope are one and the same.
  
• no enclosures are allowed

This inland letter was used as an aerogramme to the U.S. in 1951 (10 AS aerogramme rate). The sender obliterated "Inland" and endorsed "By Air Mail".

This inland letter was sent to Pakistan (1.60 R  aerogramme rate) in 1980. The sender obliterated "Inland" and endorsed "Air" and "By Air Mail" instead.