Diaphonous Painting of a Loosely-Clad Nymph

When i found this painting today, i could barely make the painting out - it was covered in dry mold - between the glass and the painting. I took it apart and was relieved to see that it cleaned up very well and fairly quickly. i found out that the seal actually says Museo Nazionale di Napoli * Archeologico *'. It is a copy of a fresco found in Pompei in the 1740s - one of four figures which were copied and sold to tourists to Pompei at the Napolitano National Museum of Archaeology. This one was probably made between 1900 and 1915. Any info appreciated. I'm not very good at reading script and deciphering handwriting, so any help appreciated.