I wish, my grandmother's younger brother, Professor Dr. Ludwig Finscher, died a couple of years ago, and I believe my aunt returned the insignia to the chancellery, but she still has the VU and the minis. The other holder of this grade, my ancestor Carl Sigismund Kunth, a close associate of Alexander von Humboldt, lived many years ago, so the insignia is long gone. I don't know what happened to the estate of Generalleutnant Georg von Heimburg on my dad's side of the family.