I have never been able to gain access to the Calcutta Mint records (they are quite uncooperative, but they are a working office and not an archive), but I do know that the full range of WWII stars and medals were struck at the mint. As late as the 1980s, they were still stocked in the medal office in New Delhi. The easiest way to tell them from British (or, for that matter, Pakistani) awards is that most of the medals to Indians were named. I have never been one for microscopic issues of numismatic detail. Some Western collectors, however, have noted design differences in these Calcutta-made medals (though they seem blissfully unaware of the naming) and some have dismissed them as fakes (as they have with the 1914 and 1914-15 Stars made and named in Calcutta). For those of us who avidly collect them, this is fine, as it keeps prices down (though some dealers have taken up the "duty" of destroying these "fakes" = historical homicide). Some Indian "fake" stars have been noted, but they are more in the way of tailor's copies, intended for wearing by veterans who mislaid their originally issued pieces, rather than to delude collectors. Given the fact that until very recently authentic medals have been common and low in price, there hasn't been much call for fakes. This may be changing.