Can anyone help me identify this? It measures 12″x24″ without the frame and 13 1/4″ x 29″ with. The frame is wood with some plaster decorations on it and it is put together with pegs threw the corners. The glass is beveled and has grapes, flowers or leaves etched into it. It belonged to my great grandmother and she was from Germany. That is all I know about it. I would like to know what it is so I can decide if I need to include it on my insurance or not