He's a mix Aby x Siberian. His mother was a grey tabby (in colouring) and he has the same colours: brownish-grey. His fur has no tabby design (exception: legs, tail and his open collier-it was a closed one when he was a baby) but is ticked. And the light tips of every hair give the shimmer.
By the way: Has anyone noticed his whiskers?
(Sorry I am in love with that cat...)