I've had a look and haven't had much luck getting specifics even with the reg'n, however, the aircraft highly resembles that of a Zenair CH-601 (I could be wrong - but thats my guess).

A possible idea might be to contact the Krnov Aeroclub and ask them for any info regarding the aircraft as it is featured in a picture on their website (have linked) implying that they may own it or if not at least know who does,

​​​​​Kind Regards,
JW

https://www.infokrnov.cz/aeroklub/os-1415...