Violin Model ID and origin in The Pegbox Posted March 9 · Report reply Another odd feature is the post patch in the back. The patch wood looks very similar to the back. I can’t tell for certain but I think it was done from the same wood as the back plate. Maybe it was over graduated during making so a patch was added...not sure. The dark line on the back is a scratch. There are no cracks in the back plate. The varnish looks the same when I look at the body. So I agree that the plates belong. the f’s just get me! I can’t find any other instrument with similar ones! Anyone else have instruments with this f cut?