Knowing that Yugoslavia had a single He-8 is rather impressive.
You are absolutely right.
It is a He-8d, which for some reason also carried the designation HE/J.
The engine though is a 480 HP Gnôme Rhône Jupiter. Slightly more powerful than the original Armstrong-Siddeley Jaguar.
The plane was taken over by the Germans and was lost in the Suda Bay during the battle of Crete.
Back to you!
BTW I doctor the pictues as well. If someone "cheats" by doing a simple picture search, I find that "not cricket".
So just to keep weak souls from falling into that trap, well...
Dilemma.