This is a beautiful RS Prussia porcelain hat pin holder. It was manufactured between 1850 and 1910. The company name is not known, but it is marked with the red RS Prussia mark.
It is in excellent, like new, condition. All the colors are vibrant and the gold trim is intact. It is 5″ tall X 4-1/2″ in diameter at the bottom.
Take a look at the photos, and if you have questions, please e-mail.