India 2011 Dandi March Set of unique 21 post cards Super rare (read description)

This set of 21 cards on dandi march was issue in 2011 in Vadodara Exhibition. Th pack contains cancellation on 21 post cards of each post office where gandhiji did night halt during his Epic salt-satyagraha a.k.a Dandi March. Each card not only contains the cancellation of that post office, but also hav a description in brief date wise about the events of that particular day which is compiled in depth and explained briefly.

This is truly one of the most informative item issued on Gandhiji. Also the set contains a certificate of Authenticity. 

Only 500 qty were printed and each pack is serial numbered and even each card is serial numbered. A very Unique and rare items in itself. Issue price was Rs. 1000/- at that time where only 1 pack was given to each collector (to only 300-400 collectors) who visited the exhibition.