Those are lovely tea cups, and that is a understatement. As DB said you did your homework well, left me with not much to look up, you have all the information right here. Yea for you
. I might push the value up a tid bit more then DB, but based on two things. First and foremost would be their stricking beauty, Second Czech markings always make the cup collector ohhh and Ahh a bit. Yea the Brick and Mortar shop (love that metaphor) would get you $25.00 to $30.00, but Ebay would eat them alive, those babies would get not just 2 bidders, but maybe More. I just sold one almost as nice and got $20.00. As a set they would sell well on consignment, maybe as fast as Ebay. This can be important info, Sets are becoming rare, for the cup collector don't want four of the same on his shelf, They have room for one, and most Brick and mortar shop will split them in a heart beat, ebay will split them even faster, and if you want to be greedy you can make more, by breaking them apart. This is the sad thing I have been discovering about this, So if you have a heart enough not to break them apart, Keep them or find someone who loves a set. Those who want a set will care little for the marks and age as much as how they look, and those have the look
. Sorry about the Psycho babble, but have been making this discovery lately and it is kind of sad, You have a set, of really beautiful cup,