Here are some:
On a few (two or three) of her hackle feathers she has a small bit of brown. You can't see it in the photos.
Thanks!
That sure does look like a cushion comb.
It is wide enough I am sure it has the rose comb gene.
And the small size, combined with the lack of obvious wattles, makes me pretty sure it has the pea comb gene as well.
I wonder if some hatchery is developing Black Chanteclers? (I doubt it, but Chantecler is the only dual-purpose breed I can think of that has a cushion comb.)
Some hatcheries are doing various Silkie-mixes, but I don't see anything that looks like a Silkie other than the comb: no crest, no extra toe, no feathers on the feet. It would be really unusual to get rid of all those other traits and keep the comb. (The actual silkie-type feathers are caused by a recessive gene, so it's easy to get normal feathering in Silkie-mix chickens.)
She is a really pretty chicken, but she has me pretty thoroughly stumped.
Oh, I suppose I should ask this: what country are you in? Different breeds are common in different countries, and I tend to think of the ones in the USA because that's where I live.