Wish we still had him, but unfortunately we got him a year before a fox found our flock. We lost a fair number of birds during that time either to them free ranging or flying the fence when penned.
Db was my thought as well. We got the cock as a trade, and some of the pullets that his original owner had were patterned similarly to our pullets so it seems to run in that line of Easter Eggers. I completely agree that they are close to transverse penciled, just they have less pattern. The cockerel's juvenile feathers were similar to that of adult hen Sicillian Buttercups, so that adds to your theory.
Your statement about the cock having red everywhere a duckwing would have black was something I noticed too. He had normal gold shoulders, then a dark red wing bar. The red also leaked across his breast. I wonder if this could have something to do with those areas being effected by Db? Like the silver being spread to areas it doesn't normally cover makes it have less effect on the red leaking into those regions? The double dose of Co and Db pushing silver into the cockerel's breasts maybe kept the red out. I don’t know, it's just an idea.
