single shot

I have recently found an old rifle in my grandma old barn and she doesn't know much about it except it's very old and belonged to her dad. We live in Bulgaria if this helps. I will be happy to know what it is and can it be restored or any other information you guys can give is much appreciated.

Anyone familiar with this brand? seems like a good deal. I watched a youtube review from a reviewer that I trust and for the price, heck cant be beat.. I would also buy a 9mm and .22lr barrel adapter for it and it could be a pretty useful little truck/ Bug out gun.. its pretty short and light...