This is one of the porcelain figures that my grandma gave me at Easter when I was younger. It is a guinea pig (marsvin) by Bing and Grøndahl. The bottom is marked with the logo, shape number (2490), and the initials TR. Based on the logo, this was made between 1970 and 1983. In addition, the clay has some incised letters that look like K and the pi symbol (π).