hi, well how very interesting indeed.
I suspect you might not have had pure pedrez as they are good layers. Over here the locals call all chickens with that colouring pedrez. There is an orginization near Braga called AMIBA which is preserving all Portuguese poultry and animals, There is a guy in the Lisbon area selling cream legbars, not selling hatching eggs though.
I like the auracans too, bred the lavenders, hard to sex till much older though. Eventually was forced to cross them with legbars, most hatched out with black feathers.
Very tempted to purchase Ameraucana, nice colour egg, seen some for sale up north, what is more charming than a bowl of multicoloured eggs?
Good luck with the breeding