In this one we can see clearly that it's FORGERY.
Also chances of forgery stamp (replica or facsimile or copy or reprint) used on this is very high because it'a a forgery stamp cover.
But what are chances of original special cancellation STOLEN from post office or post and telegraph vault or made from same vendor in 1948.!!?
Then you might see this on Private First Day cover without cachet, because it's very hard to print official cover because type of paper used on envelope might not available as well as ink.
What do you think?
I think chances are high.!!
Gandhi Stamps Club.