I would concur that it is likely Bohemian. Amongst others, both Palda and Ruckl did this type of work on blanks. Most of their work in this manner was post WWI, so technically, Czech......
As far as having a pontil and a cut top, I would agree that for some reason it does occur occasionally. There is one particular decor by Kralik I am aware of, and some, but not all of the pieces in that decor can be found with a cut rim and a pontil..... and they have not been cut down. I would note that while a few examples have had pontils, all examples have ground rims.....
So the idea that it is purely American in execution to have both is not 100% accurate either..... For whatever reason, there do appear to be exceptions to this idea that it always indicates a repair, and that these two artifacts of production are mutually exclusive.
Although unusual, my experience is that it is not an absolute given that it indicates a repair.... In most circumstances it does, but not in all....
Craig