This is KEPEX 72 (Kerala Philatelic Exhibition - 72) Special Cover issued by Indian Posts & Telegraphs Department cancelled with the stamps of several outstanding personalities. This exhibition held between 16th October to 19th October, 1972.
This is Mother Teresa First Day Cover in my collection. This First Day Cover cancelled on 27th August, 1980 with the postmark of Mother Teresa with child.
This is Indian Airlines - Air Transport Nationalisation Special Cover issued on 1st August 1953 by Indian Posts & Telegraphs Department cancelled with Tulsidas 1 Anna stamp in my collection.