I'm very excited to hear from you. Your description of your great grandfather Anton makes me think this might be the same man as my great-great uncle Anton. Since my original query I have learned that my great-great uncle Anton was remarried to a woman named Anna Neffe on 7 February 1912 at the church at Großstiebnitz (I think think this is present-day Velká Zdobnice in the Czech Republic). This Anna was born on 26 July 1871 in Großstiebnitz, at house #173. She was the daughter of forest ranger Anton Neffe and his wife Mathilde Wenzel from Geiersgraben Nr. 10.
You mentioned your great grandfather Anton being married to Josefa -- could she have been his third wife, perhaps after the Anna I just mentioned?
I'd enjoy hearing from you and comparing information. You can email me directly at firstname.lastname@example.org