We now have 4 batches of Indian type plates from Bhutan, Ceylon (Sri Lanka), Seychelles and India. All these countries have owner provided plates but all four of these batches look like they have been made by the same machines and that style is incredibly rare and then only seen very occasionally in India itself. Ceylon (Sri Lanka) plates were never made like this (there are two batches here) and all these plates are mint so they can best be described as made-to-order specials to part collectors from their money. One batch at least has probably been made in Sri Lanka and they are supposed to be private, commercial and motorbike plates. Those with serial 98Srixxxx are supposed to be diplomatic plates.
These are just some of the plates but there are many more in collections.
I believe all originated from American Ebay plate dealer stanwa who is now lerosier1945.