I came across this specialist material from Barwani a few years back when I had just started showing interest in the stamps of the Princely States of India.
They were offered to me as Barwani Proofs, a few of which were supposedly taken on cards for official records before the dies were defaced in the year 1948. I was offered the below three 'Proofs in Black on Cards' for a price of $150. I picked them up promptly, and when I happily shared my new acquisitions, I was in for a surprise!
A Mentor and a few other experienced philatelists brought to my awareness that these were the last states of the the original plates, Printing IX, but were taken much later, probably in the 1960s or even 1970s, and are certainly not 'official' proofs! I was told that the Barwani printing plates were in fact not defaced in the late 1940s but might have fell into the hands of a dealer at a later point in time who decided to run impressions of these, and that these started appearing in the market only in the 1970s. Also, there was a suggestion that that these plate impressions might have been taken with official permission of the concerned authorities of that time, although this doesn't seem that much of a possibility.
I found that there were too many of these out there on offer, and they were confidently described as Barwani Proofs, and they did sell for good prices, just like the offer price I got them for. It seems to me that not only the collectors and buyers but the dealers themselves, at least most of them, do believe that these are official proofs going by the way they confidently describe it and back it up with the prices for these. perhaps, due to the lack of in-depth knowledge and research which only a select few possess as I've observed, most of the philatelic circle does not find any reasons to doubt their origin. I came to know that genuine official proofs of Barwani Devi Singh types are very rare items, seldom seen offered in the international market.

The person who sold these to me sincerely believed they were the official proofs and as he was a very good friend of mine, he promptly took back the material when I expressed concern. And he did sell them eventually on eBay for the same prices, making me think often if I should have retained them anyway. But if not for this opportunity of having come across and bought this material, I wouldn't have known so much about the background about these as well as about Barwani stamps in general. There were a couple of suggestions as to what to call these if one should be accurate. One experienced collector lent the term "Posthumous proofs" and another renowned philatelist came out with his own description, as is typical of him: "Modern posthumous impressions, taken from original un-defaced plate of last state IX from late 1940s"
A Mentor and a few other experienced philatelists brought to my awareness that these were the last states of the the original plates, Printing IX, but were taken much later, probably in the 1960s or even 1970s, and are certainly not 'official' proofs! I was told that the Barwani printing plates were in fact not defaced in the late 1940s but might have fell into the hands of a dealer at a later point in time who decided to run impressions of these, and that these started appearing in the market only in the 1970s. Also, there was a suggestion that that these plate impressions might have been taken with official permission of the concerned authorities of that time, although this doesn't seem that much of a possibility.
I found that there were too many of these out there on offer, and they were confidently described as Barwani Proofs, and they did sell for good prices, just like the offer price I got them for. It seems to me that not only the collectors and buyers but the dealers themselves, at least most of them, do believe that these are official proofs going by the way they confidently describe it and back it up with the prices for these. perhaps, due to the lack of in-depth knowledge and research which only a select few possess as I've observed, most of the philatelic circle does not find any reasons to doubt their origin. I came to know that genuine official proofs of Barwani Devi Singh types are very rare items, seldom seen offered in the international market.

The person who sold these to me sincerely believed they were the official proofs and as he was a very good friend of mine, he promptly took back the material when I expressed concern. And he did sell them eventually on eBay for the same prices, making me think often if I should have retained them anyway. But if not for this opportunity of having come across and bought this material, I wouldn't have known so much about the background about these as well as about Barwani stamps in general. There were a couple of suggestions as to what to call these if one should be accurate. One experienced collector lent the term "Posthumous proofs" and another renowned philatelist came out with his own description, as is typical of him: "Modern posthumous impressions, taken from original un-defaced plate of last state IX from late 1940s"