Vintage Porcelain May Lily of the Valley Plate

Vintage 80’s collector plate. Iridescent birth Month cake plate. Month of May. May’s white flower. Norleans China plate is made of porcelain featuring the lily-of-the-valley in an iridescent background with sponge gold trim. there is an unknown pink maybe paint or something as shown in the picture I do exactly what it is. What are expected surface mark. It is a beautiful piece. (NF)