The piece under discussion is another phony frog mug made to deceive. There are quite a few floating around in various designs but this is the only one marked with an Etruscan Majolica stamp. It is based on a genuinely old majolica mug without a frog or mark. This isn’t a piece that would fool a knowledgeable collector but it really isn’t aimed at that audience. Like most reproductions its audience is the casual buyer. The design, the glazes are so wrong for Etruscan Majolica it would fool no one but the most naive buyer but with pottery collectors becoming ever fewer since pottery's fall from designer grace, that audience is less educated than ever.
I hope this post enlightens at least some to the awfulness of this piece.