Do you have his death certificate already? If not, here's a link which I hope will open.http://www.sos.mo.gov/images/archives/deathcerts/1914/1914_0...
The informant was George Vogt Jr, who did not know George Sr's parents' names, but gave "Eschwege, Hessen Nassau" as the birthplace. There is a town named Eschwege, if it was spelled correctly on the death cert. http://en.wikipedia.org/wiki/Eschwege
Maybe that will give you another lead if you didn't have the town name.