Inpex 1975 - Aero Philately Day with 141 Type cancellation Special Cover #WB88

15th - 23rd, INDIPEX 1973 - Complete Set of 9 Special Cover #DL165

15th All India R.K.Kacker Memorial Basketball Tournament 1973 - Set of 4 Special Cover #UP56

1960 Indo-American Society First Annual Stamp Exhibition Academy of Fine Arts Calcutta, Temporary P.O. C-890 Special Cover #WB20

1961 SIPA Indo American Stamp Exhibition - Freedom Fighters Gandhi Special Cover #Spl-16

1961 World Meteorological day Special Cover #TNC342