Beautiful Sanpan Sailboat Salt and Pepper Shakers

This is a lovely set of porcelain shakers featuring what looks like Sanpan sailboats on a wonderful blue and white background. The boat is black and the sails brown and tan. They are hand painted and have gold gilding on the top. One looks like it has a bit of wear to the gilding, but I really think it was just painted a bit thinner. They are marked made in Japan and look like pieces of Noritake I have seen, but I am not sure. They measure 2.5 inches tall and have their cork stoppers. On has a little flea bite on the bottom edge of one shaker, but it is on the back side and not very noticeable. I don't know the age.