I know nothing, but to the untrained eye, this looks like Castello's response to the Danish bonanza of freehand designs around the eighties and nineties, though it could be a later iteration on the same design theme.
I have a Thompson Cigar house pipe that is clearly a Danish influenced freehand, and it's stamped West Germany, so that gives a historical time frame for it.
That's nicely done, and not imitative, sort of an Italian take on the freehand. I like the smooth and rusticated areas of finish and the lively colored stem.