Detail of the acer leaves, for better identification.

There are 1000s of acers palmatum Katarina. Your tree is one in this group. Acer Palmatum.

agree with Klahanie most likely grown from seed as opposed to a graft.

Thanks to both of you, I was searching for name. It was grafted, Bjs, there is visible knot on the stem.
If I find the label, I will update this photo :-)

Please do. The leaf is pretty with red fingernails ? and the stem seems to be pinkish too. There are so many cultivars that would be impossible to know. I know only the usual and popular (around here) JMs. Not very many really. How tall it suppose to be at maturity, do you know?

That is one of the reasons, why I want to know its name. I bought it on the autumn, when it had beautiful orange-pinkish leaves.