German. Red paste. Tabs are open on the back because (I think) the image of the little girl is a stock photo and you were meant to put your own image in, then close the tabs. Jugendstil was a German and Scandinavian art movement, a local variant of Art Nouveau, that flourished from the mid-1890s through the first decade of the 20th century. It is characterized by its emphasis on nature-inspired motifs, dynamic curves, and a desire to break away from traditional historical styles. More angular and graphic than French Art Nouveau. The name "Jugendstil" itself comes from the Munich magazine Die Jugend ("Youth"), which popularized the style. 1 3/8" long. glass square gem. c. 1890-1910. Low carat gold or gold fill. SD makers mark - regional German workshop, perhaps linked to the Weiner Werkstatte.