Recently my partner has gotten into contact with her extended family who live across eastern Europe and one of them sent her this picture of a relative https://imgur.com/a/gwXxI8U Nobody seems to know exactly what uniform this is as her family moved around a lot and spread across many countries. We would be very interested in knowing anything more.
I can't help but you might also ask at /r/MilitaryHistory a lot of people there have identified various military uniforms.
blurry in all the worst places. I know this isn't your image but if the hat was in focus it would be a lot easier to identify.
it looks WW1-ish era to me but it could be pretty much anything. It also looks a lot like a police uniform, almost looks like a whistle on a chain hanging from his shoulder.