Pair of old plates

Pair of old plates with polychrome décor "italian renaissance". This kind of decoration is normally found in gien's earthenware but unfortunately I do not recognize the signature "a" on the back of these plates, unless someone can enlighten me! These two plates have lived but they are still in good condition and very beautiful despite two or three small defects (see photos) of manufacture that do not detract from their decorations while finesse. For savvy amateurs... Diameter: 24 cm.