Dear fellow collectors,
The city Archive of Wetzlar has written back to me. They said that Göbel lived in Wetzlar from 01.01.1906 and that he moved to Bad Homburg on the 23nd of may 1910. This probably coincides with his promotion. Prior to living in Wetzlar Göbel lived in Betzdorf.
He probably got it after 1909, since it isn't lised yet in the Ordensalmnach that Uwe mentioned. I consider it possibly that he got it after 1918, although I would find that unlikely.
At this moment we will have to wait, I have also written to the archives of the cities of Hungen, Bad Homburg and Hagenau.
Kind regards, Laurentius