Help identifying a portrait

[Jd.metz]

I'm trying to help a friend gather some more information about a portrait she has of her g-g-grandfather. He was born in Austria c.1840, and he is in a military uniform. She believes it dates to circa 1867. I know just enough about Austro-Hungarian military history to be dangerous, but the portrait looks later to me. To me, he appears to be an enlisted (no markings on the collar tabs) Hussar based on the dark blue tunic and the dark red side cap. Does anyone have any other insight? And, can you point me to any references where she might read up on Austro-Hungarian Hussar regiments? I assume they were organized regionally, and She tells me that he was from present day Leshniv, Ukraine. Thanks in advance!

[GregSingh]

It does not really look like a cavalryman's headgear.
Look here: http://www.mlorenz.at/

[Jd.metz]

GregSingh...I hear what you are saying, but then I found this: https://www.emedals.com/a-scarce-first- ... cap-eu7915. It appears the side cap became more ubiquitous among A-H units by WWI.