I have seen one other than mine. A twin to the bass, exact bass. It probably needed as much restoration and in the process, this one was shortened as it was near 43" SL before. W. Uebel is listed as a 19th century maker who opened his shop in 1868. I have 12 Uebel's listed, one of them a bow maker. The founder of the VM family was born in 1710 and they stretch into the 20th century. Karl Uebel is noted for D.Basses but in the 20th century. The lineage of the family is not laid out so I don't know who's related how within them.