I'd agree with Seiler that the name is "Giebel".
Here's some quicksearch information (Axis History Forum) that might be applicable:
Giebel or Geibel, Paul Otto (1898-1966) [SS-Brigadefuehrer und Generalmajor der Polizei] � served as naval officer in WWI; SS and Police commander "Warsaw" (SSPF "Warschau") 31 Mar 1944-1 Feb 1945; commander, Order Police (Befehlshaber der Ordnungspolizei) (BdO) Czechoslovakia Feb-May 1945 {captured at Prague; extradited to Poland; tried for war crimes by the Warsaw Voivodship Court in Poland, "served a long sentence" (Allgemeine-SS p. 57) or was sentenced to life imprisonment; released and died 12 Nov 1966 in Germany (Allgemeine-SS p. 57; ABR-SS) or committed suicide on the same date in a Polish prison (Bartoszewski 335n).}
Beautiful ring.
