Cup duo made in Belgium

Here is a duo for coffee or tea from belgium. It comes from the boch frères keramis factory, located in la louvière. In ancient ceramics, these two pretty ones are very fine and precious, their blue is dyed in the mass and its stamp inlaid next to b.f.k. Indicates that it is an iron earth ceramic. This duo is super rare and its preciousness is as fine as its ceramic. Without cracks or breaches, these centenarians have some rough edges of time, almost invisible. Each cup is 4.2cm high and 9cm in diameter. The under cups have a diameter of 13.4cm.