I think you are correct. Strange that there would be a Chevy in that era in Serbia, Yugoslavia.... Comparing to this photo of a Chevy K series they do appear to be the same..
This is a photo of my grandfather and his sisters. It was taken we think sometime in the 1920s in Europe. I am trying to ID the car to see if I can either track it down or find a similar one. It's the only photo we have.