4 deep plates Boch La Louvière Belgium

Set of 4 vintage soup plates made in Belgium by Boch La Louvière. They are in good condition, a small defect in the enamel on one plate (see photo, less shiny trace) and one plate has a small chip on the back which seems to me to be a manufacturing defect. The 4 plates are photographed. Diameter 23 cm. Weight of a plate: 496 gr.