Hi there and welcome to BYC!
Never heard of Roundhead before now. I think it might be a strain of American game cock possibly .. a specific bloodline or variety??
That color pattern alone to me.. says mixed and doesn't breed true. (I could be wrong, but it's not recognizable as anything specific)
I would expect it be a pea comb.. but that's just from the very limited research I've done since seeing this thread.. BUT two visible peas can throw straight combed birds because straight is recessive to pea. And most all so called pure breeds were
developed with many "breeds" in their backgrounds.
See if any of the following links is helpful for you in making your determination..
https://www.backyardchickens.com/threads/what-is-a-roundhead-game-chicken.471934/
https://www.backyardchickens.com/threads/how-to-tell-a-roundhead-hen-from-a-kelso-hen.671470/
https://petkeen.com/game-chicken-breeds-fighter-fowls/
https://gamefowls.wordpress.com/2014/01/06/lacy-roundhead-2/
https://gulod.wordpress.com/2015/10/20/the-roundheads/
https://jhkgamefarm.wordpress.com/2015/01/23/the-difference-between-boston-and-lacy-roundheads/
Not being familiar with the specific breed OR strain your asking about.. the things we compare for standardized breeds are eye color, shank color, skin color (on bottom of feet), feather pattern, comb type, lobe color.. in addition to body type, etc.. just some things that might help you rule in or out what YOU think.. also please use your best judgement regarding accuracy of links provided.
To me something doesn't have to be "recognized"
if it breeds true. Breeds that allow for yellow or white legs or other variations (in their standard) are one thing that makes me both crazy and allows for some ease during breeding (Leghorn come recognized in both straight and rose comb varieties). Also project colors don't have to make for cross bred even though the outcome may not YET be a recognized color. I'm not sure, and I'm not here to debate anyone.. just to have friendly and bidirectional informative conversation.
Looks to me like she has white skin.. and good sized spur (on both legs or only one?). How old did they say she was?
What I can see.. she looks like a lovely lady.
