Nice birds......in my opinion, they look right for the European type of Ayam Cemani.....some will be more rounder body, shorter neck and others a bit more slimmer, looking longer legs & neck etc.........
I don't think they would have American lines?, since American lines were imported from Europe in 2012/13....so maybe other lines from different parts of Europe?
The best looking AC line from Europe that I have seen, seem to be from Germany
The idea that someone in Europe would claim to have American lines of Ayam Cemanis makes me smile. Especially with this breed which we appreciate the opportunity to have European lines in our flocks here in the US.