Thank you for the help!
He was Hungarian and lived in Putnok, Hungary. Though I'm not sure where exactly he was born.
Can you tell me more about the belt buckle? Or maybe the medallion on the left side of the cap?
According to my family, he was injured by mustard gas during WWI and later on (in the 20's) moved to Switzerland (he had family there and back then they used to believe that the fresh air of the mountains might help the lungs) where he eventually past away.
Do you have an email address of the people I should contact over in Hungary? And if so, can I email them in English?