When I first saw him, I thought he was a blue Rose comb but he doesn't have the white ear lobes. He doesn't have the beard/muffs of D'Anvers. Most of the bantam rose combed breeds have white ear lobes. The only breed I can think of off hand is Wyandotte. But, he may not be purebred, so he could be just about anything. He's a lovely boy though.
at first i thought wyandotte because of the comb but the chickens not heavy set like a dotte is, hes a lot leaner which i want to say he has some sort of game in him...so over all a blue mix breed