Danke schön Ravenna,
Two years of German at school, but sorry, my German is very poor, the only chance I ever had to practise a bit was when I went to Turkey in the 80s
I think it is just the plain common variety, Acer p. tunberghi. I think the colors were particularly spectacular this year because I defoliated it in June.
Wait for my "Orange Dream" ones to be more than sticks in a pot, the spring colours are fantastic...