looking at the breed again.. I still think they are Extended blacks lacking melanizers..
this pic of a pair was taken from here: http://www.rarebreedauctions.com/103493,auction_id,auction_details
Quote:
they look like a melanized Birchen or under melanized E/E to me.. roos look like birchen and hens look like extended black.
http://www.feathersite.com/Poultry/CGD/Isbar/BRKIsbar.html