Portrait by Stassera drawing on paper young girl early twentieth century

Here is a drawing on paper, a portrait of a young girl, everything was executed with beautiful precision. We did not identify the author. The work does not have a protective tile, you will notice that the paper is a little curled, we report old marks, as for the pass, it is very damaged, the frame also has some damage. For the condition, thank you for detailing the photos. L2906. Feel free to zoom in. Photos are an integral part of the description. Size: Frame. Height: 49 cm. Width: 41 cm. Thickness: 1.7 cm. Paint. Height: 38.8 cm. Width: 30.8 cm.