The diameter is 26 mm, as mentioned. Might indeed have been clipped, but only slightly.
I'm using "Prague groschen" in a generic sense. Did they make them somewhere other than Kutna Hora?
And if you want pics of the other one... why not. (It appears to be cleaned though, but this is probably normal for something that came from the 15th century.)


(Sorry for the awful photos, still smartphone camera. And, yes, it's also ridiculously worn. 27 mm, by the way.)
I'm using "Prague groschen" in a generic sense. Did they make them somewhere other than Kutna Hora?
And if you want pics of the other one... why not. (It appears to be cleaned though, but this is probably normal for something that came from the 15th century.)


(Sorry for the awful photos, still smartphone camera. And, yes, it's also ridiculously worn. 27 mm, by the way.)






















