India: Tata Air Service airmail labels

Here is a nice an very rare airmail label issued by Tata Air Service. It was issued for airmail
Madras-Karachi.

Tata Airlines, a division of Tata Sons Ltd. (now Tata Group) was founded by J. R. D. Tata in 1932 as Tata Sons. It was started as a mail service between Karachi, Bombay and Madras.
In 1938 it was re-christened as Tata Air Services and later same year was renamed as Tata Air Lines. By this time Delhi and Colombo were also serviced.

Year: 11.1932, Ungummed. Günter Mair's catalogue no: - IND-B-1, perforated 11, sheets, 
dark violet-blue/white, 5*****