Sorry, but I must to disappoint you. Kalmykia, as well as Dagestan, Ingushetia and Bashkortostan, Karelia, and so on - are not independent states. They are all - part of the Russian Federation. They don't have their own currency and postage stamps. At the right side of this card - is just a primitive-made sticker, you will not find it in any catalog.
I'm totally aware of that. However, it's still good to know that these postcards came directly from these republics as the postmark on the stamps clearly shows that. There are only 9 "entities" missing from my collection and most of them are not independent states, but I just wanted to make my collection complete in this way, too. Thank you for your remark though.By the way, what do you think of the collection?